MINISTRY OF EDUCATION

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1 Republic of Namibia MINISTRY OF EDUCATION NAMIBIA SENIOR SECONDARY CERTIFICATE (NSSC) PHYSICAL SCIENCE SYLLABUS ORDINARY LEVEL SYLLABUS CODE: 4323 GRADES DEVELOPED IN COLLABORATION WITH UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS

2 Republic of Namibia MINISTRY OF EDUCATION NAMIBIA SENIOR SECONDARY CERTIFICATE (NSSC) PHYSICAL SCIENCE SYLLABUS ORDINARY LEVEL This syllabus replaces previous NSSC syllabuses and will be implemented in 2010 in Grade 11

3 Ministry of Education National Institute for Educational Development (NIED) Private Bag 2034 Okahandja Namibia Copyright NIED, Ministry of Education, 2009 Physical Science Syllabus Ordinary Level Grades ISBN: Printed by NIED Publication date: 2009

4 TABLE OF CONTENTS 1. Introduction Rationale Aims Learning Content... 3 General Science Section... 4 Physics Section... 6 Chemistry Section Asssessment Objectives Scheme of Assessment Specification Grid Grade Descriptions Glossary of Terms Used in Science Papers Annexures A. Assessment Criteria for Practical Assessment B. Criteria for the Assessment of Practical Skills and Abilities C. Explanatory Notes for Guidance D. Notes for Use in Qualitative Analysis E. Data Sheet: The Periodic Table of the Elements F. Units of Physical Quantities G. NSSCO Sciences: Form for Practical Activities H. NSSCO Sciences: Individual Learner Record Card I. Instructions for Completing Individual Learner Record Cards J. NSSCO Sciences: Coursework Assessment Summary Form... 60

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6 1. INTRODUCTION The Namibia Senior Secondary Certificate Ordinary Level (NSSCO) syllabus for Physical Science is designed as a two-year course leading to examination after completion of the Junior Secondary Certificate. The syllabus is designed to meet the requirements of the Curriculum Guide for Formal Senior Secondary Education for Namibia and has been approved by the National Examination, Assessment and Certification Board (NEACB). The National Curriculum Guidelines, applicable at the stage of senior secondary education (Grades 11 and 12) and at equivalent stages of non-formal education, as a part of life-long learning, recognise the uniqueness of the learner and adhere to the philosophy of learnercentred education. The Namibia National Curriculum Guidelines: recognise that learning involves developing values and attitudes as well as knowledge and skills; promote self-awareness and an understanding of the attitudes, values and beliefs of others in a multilingual and multicultural society; encourage respect for human rights and freedom of speech; provide insight and understanding of crucial global issues in a rapidly changing world which affect quality of life: the AIDS pandemic, global warming, environmental degradation, distribution of wealth, expanding and increasing conflicts, the technological explosion and increased connectivity; recognise that as information in its various forms becomes more accessible, learners need to develop higher cognitive skills of analysis, interpretation and evaluation to use information effectively; seek to challenge and to motivate learners to reach their full potential and to contribute positively to the environment, economy and society. Thus the Namibia National Curriculum Guidelines should provide opportunities for developing essential skills across the various fields of study. Such skills cannot be developed in isolation and they may differ from context to context according to a field of study. The skills marked with an * are relevant to this syllabus: The skills are: Communication skills * Numeracy skills * Information skills * Problem-solving skills * Self-management and Competitive skills * Social and Cooperative skills Physical skills Work and Study skills * Critical and Creative thinking* NSSCO Physical Science Syllabus NIED

7 2. RATIONALE Learning experiences in the natural scientific area aim at increasing the learners' knowledge and understanding of the physical and biological world of which they are part. This includes understanding how people use the natural environment to satisfy human needs, and how the environment may be changed in ecologically sustainable ways. Critical thinking, investigating phenomena, interpreting data, and applying knowledge to practical (experimental and investigative) skills and abilities are essential to understanding the value and limitations of natural scientific knowledge and methods, and their application to daily life. The application of scientific knowledge and attitudes to health is of special relevance for the individual, the family and society as a whole. The overall aim of the syllabus is to equip learners with the necessary knowledge, skills and attitudes that will enable them to enter tertiary education or the world of work. 3. AIMS The aims of the syllabus are the same for all learners. These are set out below and describe the educational purposes of a course in Physical Science for the NSSCO examination. They are not listed in order of priority. The aims are to: 1. provide, through well designed studies of experimental and practical science, a worthwhile educational experience for all learners, whether or not they go to study Science beyond this level and, in particular, to enable them to acquire sufficient understanding and knowledge to 1.1 become confident citizens in a technological world, to take or develop an informed interest in matters of scientific importance; 1.2 recognise the usefulness and limitations of scientific method and to appreciate its applicability in other disciplines and in everyday life; 1.3 be suitably prepared for studies beyond the NSSCO level in pure sciences, in applied sciences or in science-dependent vocational courses. 2. develop abilities and skills that: 2.1 are relevant to the study and practice of Physical Science; 2.2 are useful in everyday life; 2.3 encourage efficient and safe practice; 2.4 encourage effective communication. 3. develop attitudes relevant to Physical Science such as 3.1 concern for accuracy and precision; 3.2 objectivity; 3.3 integrity; 3.4 enquiry; 3.5 initiative; 3.6 inventiveness. 4. stimulate interest in, and care for, the environment. 5. promote an awareness that: 5.1 scientific theories and methods have developed, and continue to do so, as a result of the co-operative activities of groups and individuals; 5.2 the study and practice of Science is subject to social, economic, technological, ethical and cultural influences and limitations; 5.3 the applications of Science may be both beneficial and detrimental to the individual, the community and the environment; 5.4 Science transcends national boundaries and that the language of Science, correctly and rigorously applied, is universal. NSSCO Physical Science Syllabus NIED

8 4. LEARNING CONTENT NOTE: 1. The learning content outlined below is designed to provide guidance to teachers as to what will be assessed in the overall evaluation of learners. They are not meant to limit, in any way, the teaching program of any particular school. 2. The learning content is set out in THREE columns: (a) Topics (b) General Objectives (c) Specific Objectives 3. Topics refer to those components of the subject which learners are required to study. The General Objectives are derived from the topic and is the general knowledge, understanding and demonstration of skills on which learners will be assessed. The Specific Objectives are the detailed and specified content of the syllabus, which will be assessed. 4. Suggestions for practical activities or demonstrations that are considered essential, and which all learners should be exposed to, as preparation for the Applied Practical Skills examination (assessed by the national examination at the end of Grade 12), are included at the end of each topic. NSSCO Physical Science Syllabus NIED

9 GENERAL SCIENCE SECTION It is important that throughout this section, attention should be drawn to the foundation of science concepts and way of thought; the mathematical requirements, calculations, units and the conversion thereof; the naming and identifying of appropriate apparatus and the correct use thereof. TOPIC 1. Mathematical requirement GENERAL OBJECTIVES Learners will: know mathematical procedures which are required throughout the syllabus 2. Scientific Skills 2.1 Recording data know the scientific way of presenting data 2.2 Drawing graphs and tables understand and recognise the correct way to draw graphs NSSCO Physical Science Syllabus NIED SPECIFIC OBJECTIVES Learners should be able to: add, subtract, multiply and divide use averages, decimals, fractions, percentages, ratios and reciprocals use direct and inverse proportion use positive, whole number indices and exponents in calculations make approximate evaluations of numerical expressions use usual mathematical instruments (ruler, compasses, protractor, set square), etc. explain the meaning of angle, curve, circle, radius, diameter, square, parallelogram, rectangle, diagonal solve equations of the form x = yz for any one term when the other two are known recognise and use points of the compass (N, S, E, W), bearing taken and the rules for bearing taking present each column of a table by heading it with the physical quantity and the appropriate unit, e.g. time/s (units should be in the heading of the column and not in the measurements in the column) use column headings of the table to be directly transferred to the axes of a constructed graph select suitable scales and axes for graphs plot the independent variable on the x-axis (horizontal axis) and plot the dependent variable on the y-axis (vertical axis) label each graph with the appropriate heading (by convention always the dependent versus independent variable) label each axis with the physical quantity and the appropriate unit, e.g. time/s draw the graph as the whole diagrammatic presentation. It may have one or several curves plotted on it

10 TOPIC 2.3 Basic units, quantified and derived units GENERAL OBJECTIVES Learners will: understand scientific notation, prefixes and significant figures 2.4 Error and accuracy understand errors, sources of error, their rectification, accuracy and precision 2.5 Instruments and purpose of measurement understand the relationship between accuracy of measurement and number of significant figures used to record measurements SPECIFIC OBJECTIVES Learners should be able to: draw and name curves draw appropriate lines through relevant points being a straight line or smooth curve present points on the curve as clearly marked as crosses (x) or encircled dots ( ). If a further curve is included, vertical crosses (+) may be used to mark the points explain and use the relationship between length, surface area and volume and their units on metric scales identify the correct SI unit and derive units (cross reference to page 55) explain and use suffixes, use multiples (tera, giga, mega, kilo) and sub-multiples (deci, centi, milli, micro, nano, pico) of units use standard notation use acceptable methods of stating units, e.g. metres per second or m per s be written as m/s or m s -1 (Note: The solidus (/) will be used for a quotient and indicate units in labels of tables and graphs e.g. distance/cm) state and use the relationship between accuracy of measurement and the appropriate number of significant figures used to record measurements and present calculated data identify sources of error and their margin of error suggest possible preventative measures name appropriate apparatus for the measurement of time, temperature, mass and volume, including burettes, pipettes and measuring cylinders NSSCO Physical Science Syllabus NIED

11 PHYSICS SECTION It is important that throughout this section, attention should be paid to showing the relevance of concepts to the learner s everyday life and to the natural and human-made word considerations in the industry, such as the availability of research to produce new ways of using energy and the impact on the environment (e.g. nuclear power stations) TOPIC 1. General Physics GENERAL OBJECTIVES Learners will: 1.1 Length and time know how to use equipment to measure time and length 1.2 Speed, velocity and acceleration understand speed, velocity and acceleration as well as recognise different types of motion on graphs SPECIFIC OBJECTIVES Learners should be able to: use and describe the use of rulers and measuring cylinders to determine length or volume use and describe the use of clocks and devices for measuring an interval of time (wrist watch and stop watch) measure and describe how to measure a short interval of time (including the period of a pendulum) describe simple experiment to show that the only variable that effects the period is the length of simple pendulums determine the period of a simple pendulum use vernier calipers and calipers for the measurement of a small distance define distance as physical distance moved (without considering direction) define displacement as the distance moved in a particular direction define speed as rate of change of distance with time define velocity as rate of change of displacement with time identify linear motion for which the acceleration is constant and calculate the acceleration (a = Δv/Δt) draw and interpret a velocity/time graph draw and interpret a speed/time graph identify motion for which the acceleration is not constant identify from the shape of a velocity/time graph when a body is - at rest - moving with constant velocity - moving with changing velocity calculate the area under a velocity/time graph to determine the distance travelled for motion with constant acceleration NSSCO Physical Science Syllabus NIED

12 TOPIC GENERAL OBJECTIVES Learners will: 1.3 Mass and Weight understand the terminology to determine the mass and weight of a body 1.4 Density understand density of an object 1.5 Forces Effects of forces recognise the significance of a force SPECIFIC OBJECTIVES Learners should be able to: state that the acceleration of free fall for a body near to the earth is constant describe qualitatively the motion of bodies falling in a uniform gravitational field with and without air resistance (including reference to terminal velocity) describe the mass of a body state that weight is a force define inertia as mass having the property which resists change in motion define earth s gravitational field strength (g) as constant of gravitational force of 10 N on 1 kg of mass (10 N/kg) and as gravitational acceleration due to gravitational force towards the centre of the earth (10 m/s 2 ) calculate the weight of a body from its mass describe, and use the concept of, weight as the effect of a gravitational field on a mass describe that mass can be determined due to its weight (comparing the effect of using balance or spring) relate the term density to the mass and volume of an object and calculate the density of the object describe an experiment to determine the density of a liquid and of a regularly shaped solid and make the necessary calculation describe the determination of the density of an irregularly shaped solid by the method of displacement describe floating and sinking in terms of different densities, the density of a substance related to the density of water explain why the density of water around 4 o C is a maximum state and use that a force may produce a change in size and/or shape of a body describe the ways in which a force may change the motion of a body plot extension-load graphs and describe the associated experimental procedure and use proportionality in simple calculations take readings from and interpret extension-load graphs (Hooke s law, as such, is not required) identify the significance of the term limit of proportionality for an extensionload graph perform simple calculations with the extension or force using the proportionality state the relation between force, mass and acceleration NSSCO Physical Science Syllabus NIED

13 TOPIC GENERAL OBJECTIVES Learners will: Turning effect know the turning effect and the conditions for equilibrium Centre of mass recognise the centre of mass 1.6 Energy, work and power Major sources of energy and alternative sources of energy show understanding of sources of energy and alternative sources of energy SPECIFIC OBJECTIVES Learners should be able to: describe the moment of a force as a measure of its turning effect and give everyday examples (such as crowbar, wheelbarrow, pliers, scissors, tweezers or tongs) describe the difference between moment and work (one is a vector and the other a scalar) calculate the moment of a force given the necessary information perform and describe an experiment (involving vertical forces) to verify that there is no net moment on a body in equilibrium state that, when there is no resultant turning effect, a system is in equilibrium describe an experiment to determine the position of the centre of mass of a plane lamina describe qualitatively the effect of the position of the centre of mass on the stability of simple objects compare sources of energy and energy converting from one form to another, including reference to - chemical/fuel energy (a regrouping of atoms) - energy from water hydroelectric energy, waves, tides - geothermal energy - nuclear energy (nuclear fission of heavy atoms) - solar energy (fusion of nuclei of atoms in the sun) - wind energy outline the advantages and disadvantages of the use of different sources of energy, including environmental considerations and the distinction between finite and renewable sources outline the mass and energy equation E = mc 2 (as utilised in nuclear reactions) define efficiency as useful energy output divided by total energy input NSSCO Physical Science Syllabus NIED

14 TOPIC GENERAL OBJECTIVES Learners will: Energy show understanding of energy of motion and energy of position (i.e. gravitational and strain) Work show understanding of work Power show understanding of power 1.7 Pressure relate pressure to force and area using appropriate examples SPECIFIC OBJECTIVES Learners should be able to: give examples of energy in different forms, its conversion and conservation and apply the principle of energy conservation to simple examples describe processes by which energy is converted from one form to another, including reference to describe energy transfer in terms of work done and make calculations involving F x d use the terms kinetic and potential energy in context recall and use the expressions k.e. = 1 / 2 mv 2 p.e. = mgh explain, without calculation, how the work done relates to the magnitude of a force and distance moved state and use ΔW = F x d = ΔE calculate power from work done and time taken, using appropriate examples recall and use the equation P = E/t = W/t in simple systems define pressure as force acting on a unit area recall and use p = F/A state that the pressure beneath a liquid surface is related to depth and to density using appropriate examples describe the atmospheric pressure changes with changes of altitude use and describe the use of a manometer, aneroid barometers and Bourdon gauge NSSCO Physical Science Syllabus NIED

15 Suggestions for practical work: General Physics: Practical suggestions: determine the period of a simple pendulum determine the time for a very short distance move identify linear motion of which acceleration is constant and calculate the acceleration describe an experiment to determine the density of a liquid, a regular solid and make necessary calculations plot extension-load graphs take readings from and interpret extension-load graphs describe an experiment to verify that there is no net moment on a body in equilibrium describe an experiment to determine the position of the centre of mass of a plane lamina calculate and use: work = force x displacement recall and use: power = work/time construct a simple pendulum and investigate which of the variable(s) determines the period of the pendulum determine the period of a ticker timer measure an interval of time for an object falling a very short distance using two stop watches investigate motion to determine approximate constant walking speed investigate motion to determine acceleration due to gravitational pull using a trolley, ticker timer, ticker tape and inclined plane design and carry out experiments to find the density of: - a liquid - regular and - irregular shaped solids use a spring (or office elastic band) and an appropriate set of masses to investigate the elasticity of the spring (or elastic band) use a balanced ruler and sets of masses to show that there is no net moment in an equilibrium use a mounted nail, a plumb line and irregular lamina to find the centre of gravity of the plane lamina investigate the power of your leg muscles when jumping (climbing) up a stair case (chair) NSSCO Physical Science Syllabus NIED

16 TOPIC 2. Thermal Physics 2.1. The Particle Nature of Matter 2.2 Thermal properties Thermal expansion of solids, liquids and gases Measurement of temperature Melting and boiling 2.3 Transfer of thermal energy GENERAL OBJECTIVES Learners will: understand the significance of the kinetic particle nature of matter know the expansion of solids, liquids and gases appreciate how a physical property which varies with temperature may be used for the measurement of temperature understand the process of melting and boiling know and understand the different ways of transfer of heat SPECIFIC OBJECTIVES Learners should be able to: explain the kinetic particle theory as: - the particles and the space the particles occupy - the inter-particle forces between particles - the constant state of motion of the particles - elastic collisions between particles - kinetic energy of particles in relation to the temperature describe the states of matter and explain their interconversion in terms of the kinetic particle theory in everyday life describe diffusion and Brownian motion in terms of kinetic theory in terms of the kinetic particle theory: describe qualitatively the thermal expansion of solids, liquids and gases state and explain the relative order of magnitude of the expansion of solids, liquids and gases in terms of the kinetic particle theory identify and explain some of the everyday applications and consequences of thermal expansion state and apply examples of how a physical property which varies with temperature may be used for the measurement of temperature explain the sensitivity, range and linearity of measurements of temperature state the need for and identify a fixed point describe the structure and action of liquid-in-glass thermometers describe the structure and action of a thermocouple and show understanding of its use for measuring high temperatures and for those which vary rapidly describe melting and boiling in terms of energy input without a change in temperature define melting point and boiling point as changing of state of a substance distinguish between boiling and evaporation establish and interpret heating and cooling curves of water NSSCO Physical Science Syllabus NIED

17 TOPIC GENERAL OBJECTIVES Learners will: Conduction understand conduction as one form of energy transfer Convection understand convection as one form of energy transfer Radiation understand radiation as one form of energy transfer Consequences of energy transfer relate to the consequence of energy transfer SPECIFIC OBJECTIVES Learners should be able to: define conduction of heat as the flow of heat through a material without any flow of the material describe experiments to demonstrate the properties of good and bad conductors of heat give a simple molecular account of the heat transfer in insulators and migration of electrons in metals define convection as the flow of liquid or gas caused by a change in density, in which the whole medium moves and carries heat energy with it explain the difference between conduction and convection in terms of physical movement of the medium of transfer of thermal energy describe convection in fluids to density changed and describe experiments to illustrate convection define radiation as the transfer of heat electromagnetic waves which do not require a medium identify infra-red radiation as part of the electromagnetic spectrum describe experiments to show the properties of good and bad emitters and good and bad absorbers of infra-red radiation identify and explain some of the everyday applications and consequences of conduction, convection and radiation Suggestions for practical work: Thermal Physics: Practical suggestions: establish and interpret heating (cooling) curves for water describe an experiment to demonstrate good or bad conductors describe an experiment to illustrate convection in fluids describe an experiment to demonstrate the properties of good or bad emitters and absorbers heat a sample of ice and record the temperature at constant intervals investigate good or bad conductors investigate good or bad conductors evaluate the properties of good or bad emitters and absorbers NSSCO Physical Science Syllabus NIED

18 TOPIC 3. Properties of Waves, including Light and Sound 3.1 General wave properties GENERAL OBJECTIVES Learners will: understand general wave properties SPECIFIC OBJECTIVES Learners should be able to: define pulse as single disturbance in substance define oscillations or simple harmonic motion as any repeated to-and-fro motion of a fluid or elastic solid, e.g. tuning-fork, pendulum or stretched string describe what is meant by wave motion (propagation) as illustrated by vibration in ropes, springs and by experiments using water waves distinguish between transverse and longitudinal waves (in terms of pulse movement in relation to wave propagation and the movement in a medium of different density) define speed, frequency, period, wavelength and amplitude recall and use the equation c = λf define the term wave front in wave motion, as the surface containing adjacent points that are in the same phase explain and graphically represent the term wave front use the term wave-front to describe the observation of water waves in a ripple tank undergoing: - reflection at a plane surface - refraction due to a change of speed (use change in depth as change in medium) - diffraction explain: reflection (in terms of angle i = r), refraction (change in optical density or depth) diffraction (object in path of wave) describe the formation and give characteristics of diffraction patterns of water waves in a ripple tank at narrow and wide openings NSSCO Physical Science Syllabus NIED

19 TOPIC GENERAL OBJECTIVES Learners will: 3.2 Light understand different properties of light and their applications Reflection of light Refraction of light Thin converging lens Electromagnetic spectrum SPECIFIC OBJECTIVES Learners should be able to: describe the formation, and give the characteristics, of an optical image formed by a plane mirror use the law angle of incidence = angle of reflection perform simple constructions, measurements and calculations define refraction as light entering or leaving a medium with different optical density describe the refraction, including angle of refraction, in terms of the passage of light through a parallel sided glass block determine and calculate refractive index using n = sin i /sin r describe and graphically represent the path of light through a rectangular glass block and triangular prism explain dispersion of white light into continuous spectrum explain colour outline the formation, and give the characteristics, of an optical image formed by a converging lens (diverging lens only in reference to correction of sight) describe the action of a thin converging lens on a beam of light (diverging lens only in reference to correction of sight) use the term focal length and focal point use and describe the use of a single lens as a magnifying glass describe the eye as converging lens (focus light on retina) and describe the uses of lenses to correct short and long sight outline the range of the electromagnetic spectrum that is in the radioactive range describe the main features of the electromagnetic spectrum and state that all e.m. waves travel with the same high speed in vacuum state the approximate value of the speed of electromagnetic waves in a vacuum describe the main uses and dangers of the electromagnetic spectrum NSSCO Physical Science Syllabus NIED

20 TOPIC GENERAL OBJECTIVES Learners will: 3.3 Sound understand the production and transmission of sound know the effect of noise on human hearing SPECIFIC OBJECTIVES Learners should be able to: describe the production of sound by vibrating sources outline the approximate range of audible frequencies discuss the frequency of vibration in relation to the pitch of the sound discuss the amplitude of vibration in relation to the loudness of the sound describe displayed waveforms on cathode-ray oscilloscope (c.r.o.) screen explain that a medium (solid, liquid and gas) is required in order to transmit sound waves study the speed of sound by using echos state unit of sound as decibel discuss the effect of noise on human hearing Suggestions for practical work : Properties of Waves, including Light and Sound: Practical suggestions: describe the use of water waves perform simple constructions, measurements and calculations (for reflection and refraction only) of a beam of light describe investigation to determine the speed of sound describe the use of water waves to show: - reflection at a plane surface - refraction due to change of speed - diffraction determine relevant angles with reflection of light refraction through a parallel sided block thin converging lens investigate the speed of sound using different media NSSCO Physical Science Syllabus NIED

21 TOPIC 4. Electricity and magnetism 4.1 Simple phenomena of magnetism 4.2 Electrostatics and electric charge GENERAL OBJECTIVES Learners will: relate to the simple phenomena of magnetism understand electrostatics and simple experiments to show nature of charge and the detection of charge SPECIFIC OBJECTIVES Learners should be able to: state the properties of magnets give an account of induced magnetism in terms of molecular magnets distinguish between ferrous and non-ferrous materials describe an experiment to identify the pattern of field lines round a bar magnet (iron filings and plotting compass) distinguish between the magnetic properties of iron and steel describe and explain the difference between the design and use of permanent magnets and electromagnets (as used in e.g. bell and relay) explain magnetism in terms of molecular magnets describe simple experiments to show the production and detection of electrostatic charges (using electroscope) state that there are positive and negative charges state that charge is measured in coulombs state that unlike charges attract and that like charges repel state some uses of electrostatics (photocopying) explain the phenomenon of lightning outline the working of the Van der Graaf generator 4.3 Electricity know the basic concept of electricity to be used in simple experiments and calculations Current state that current is related to the flow of charge show understanding that a current is a rate of flow of charge and recall and use the equation I= Q/t explain and distinguish between alternating current (ac), direct current (dc), and electron and conventional current state the correct way to connect an ammeter NSSCO Physical Science Syllabus NIED

22 TOPIC Potential difference (p.d.) GENERAL OBJECTIVES Learners will: SPECIFIC OBJECTIVES Learners should be able to: state that the potential difference (p.d.) of a source of electrical energy is measured in volts state that potential difference is defined in terms of the ability to drive charge round a complete circuit define potential difference as energy per unit charge (V = E/Q) state that the potential difference across a circuit component is measured in volts state the correct way to connect a voltmeter Resistance define Ohm's Law at constant temperature recall and use the equation V = IR describe an experiment to determine resistance using a voltmeter and an ammeter relate (without calculation) the resistance of a wire to its length and to its diameter recall and use qualitatively the proportionality between resistance and the length and the inverse proportionality between resistance and cross-sectional area of a wire and the proportionality between resistance and the temperature recall and use qualitatively the proportionality between resistance and the temperature sketch the V/I characteristic graphs for metallic conductors (Ohmic) sketch the V/I characteristic graphs for non-metallic conductors (non-ohmic) such as bulbs investigate the relationship between current and potential difference across various conductors (nichrome, copper, eureka wires and light bulb) distinguish between Ohmic and non-ohmic conductors 4.4 Electric circuits become aware of the applications of electrical circuits draw and interpret circuit diagrams containing sources, switches, resistors (fixed and variable), ammeters, voltmeters, magnetising coils, bells and fuses draw and interpret circuit diagrams containing relays state that the current at every point in a series circuit is the same state that, for a parallel circuit, the current from the source is larger than the current in each branch NSSCO Physical Science Syllabus NIED

23 TOPIC 4.5 Practical electric circuitry GENERAL OBJECTIVES Learners will: understand the use of electricity in everyday life NSSCO Physical Science Syllabus NIED SPECIFIC OBJECTIVES Learners should be able to: recall and use the fact that the sum of the p.d. across the components in a series circuit is equal to the total p.d. across the supply state that, for a parallel circuit, the p.d. stays the same across each branch give the combined resistance of two or three resistors in series state that the combined resistance of two resistors in parallel is less than that of either resistor by itself calculate the effective resistance of two or three resistors in parallel recall and use the fact that the current from the source is the sum of the currents in the separate branches of a parallel circuit draw and interpret circuit diagrams containing diodes as rectifiers Uses of electricity describe the uses of electricity in heating, lighting (including lamps in parallel), motors, bell and relay recall and use the equations P = I V, E = I Vt and their alternative forms Safety considerations 4.6 Electromagnetic effects Electromagnetic induction understand the electromagnetic effects and their mechanical application state the hazards of : - damaged insulation - overheating of cables - overloading describe the wiring of an electrical plug describe the use of safety devices, including earthing, circuit breakers and fuses define electro motive force (e.m.f.) as the maximum amount of work that can be done by a source state the difference between e.m.f. and p.d. as the maximum work per charge that can be done and the work per charge actually done describe an experiment which shows that a changing magnetic field can induce an e.m.f. in a circuit state the factors affecting the magnitude of the induced e.m.f. state that the direction of induced current is such as to oppose the change causing it

24 TOPIC GENERAL OBJECTIVES Learners will: SPECIFIC OBJECTIVES Learners should be able to: a.c. generator describe a rotating-coil generator and the use of slip rings sketch a graph of voltage output against time for a simple a.c. generator d.c. motor state that a current-carrying coil in a magnetic field experiences a turning effect and that the effect is increased by increasing the number of turns on the coil describe the effect of increasing the current or magnetic field relate this turning effect to the action of an electric motor Transformer describe the construction of a basic iron-cored transformer state the principle of operation of a transformer use the equation (V p / V s ) = (N p / N s ) recall and use the equation V p I p = V s I s (for 100% efficiency) explain the energy loss in cables and how it can be reduced (reference to 'Uses of electricity') describe the use of the transformer in high-voltage transmission of electricity give the advantages of high voltage transmission Simple treatment of the cathode-ray oscilloscope (c.r.o.) Suggestions for practical work: Electricity and magnetism: describe the use of a c.r.o. to display waveforms describe the use of a c.r.o. to measure p.d's and short intervals of time (detailed circuits are not required) distinguish between the direction of electron current and conventional current describe the use of a c.r.o. to display waveforms of sound waves to indicate the difference between high and low pitch (frequency) describe the use of a c.r.o. to display waveforms of sound waves to indicate the different loudness (amplitude) Practical suggestions: describe experiments to identify the pattern of field lines round a bar magnet give account of induced magnetism distinguish between the magnetic properties of iron and steel use plotting compass (or iron filings) to establish the magnetic field around a bar magnet investigate methods of induced magnetism evaluate magnetic properties of iron and steel NSSCO Physical Science Syllabus NIED

25 distinguish between the design and use of permanent and electromagnets describe experiments to show production and detection of electrostatic charges describe experiments to indicate the correct construction of an electric circuit describe an experiment to determine resistance using a volt meter and an ammeter sketch the V/I characteristic graph for metallic (Ohmic) conductors describe an experiment to investigate the dependence of temperature, length and cross sectional area on the resistance of an conductor describe experiments to show that a changing magnetic field can induce an e.m.f. in a circuit indicate the working of a.c. generator and a d.c. motor evaluate the relationship between the design and use of permanent and electromagnets investigate the production and detection of electrostatic charges construct a circuit using correctly an ammeter, voltmeter, one or more resistors in series or parallel, a power source (cells or power supply) investigate Ohm's Law for a variety of resistors (conductors) investigate the total resistance of two or more resistors in a series connection investigate the total resistance of two or more resistors in a parallel connection investigate the : - proportionality between resistance and the temperature of a conductor - proportionality between resistance and the length of a conductor - inverse proportionality between resistance and the cross sectional area of conductors investigate how a changing magnetic field induces a p.d. and how this induced p.d. can be maximised build a working model of an a.c. generator build a working model of d.c. motor NSSCO Physical Science Syllabus NIED

26 TOPIC GENERAL OBJECTIVES Learners will: SPECIFIC OBJECTIVES Learners should be able to: 5. Nuclear Physics 5.1 The nuclear atom know the composition of the atom Nucleus describe the composition of the nucleus in terms of protons and neutrons use the term proton number, Z use the term nucleon number, A use the term nuclide and nuclide notation A ZX use the nuclide notation in equations to show alpha and beta decay Isotopes define isotopes as atoms with the same proton number but different nucleon number give and explain examples of practical applications of isotopes 5.2 Radioactivity Safety precautions Detection of radioactivity Characteristics of the three kinds of emission know radioactive material safety precautions show awareness of the existence of background radioactivity know different types and characteristics of the three kinds of emission describe how radioactive materials are handled, used and stored in a safe way describe the existence of background radioactivity describe the detection of alpha-particles (α), beta-particles (β) and gamma-rays (γ), (cloud chamber, G-M counter and photographic film) state that radioactive emissions occur randomly over space and time describe radioactive emission: - their nature - their relative ionising effects their relative penetrating abilities describe their deflection in electric fields and magnetic fields Radioactive decay know radioactive decay state the meaning of radioactive decay, using word equations to represent changes in the composition of the nucleus when particles are emitted Half-life understand half-life define half-life as the time for one-half of any quantity of radioactive nuclei to decay use the term half-life in simple calculations which might involve information in tables or decay curves NSSCO Physical Science Syllabus NIED

27 Demonstration suggestions for Nuclear Physics: Demonstration suggestions: describe the detection of radioactive radiation establish half-life of radioactive material investigate the different types of radiation and their different properties use isotope generator and establish a decay curve to find the half-life of the radioactive isotopes NSSCO Physical Science Syllabus NIED

28 CHEMISTRY SECTION It is important that throughout this section, attention should be drawn to: The finite life of the world s resources and hence the need for recycling and conservation Economic considerations in the chemical industry, such as the availability and cost of raw materials and energy The importance of chemicals in industry and in everyday life TOPIC 1. Experimental Techniques GENERAL OBJECTIVES Learners will: understand the principles of experimental techniques SPECIFIC OBJECTIVES Learners should be able to: name appropriate apparatus for the measurement of time, temperature, mass and volume, including burettes, pipettes and measuring cylinders describe paper chromatography (including the use of locating agents) and interpret simple chromatograms indicate that mixtures melt and boil over a range of temperatures identify pure substances by distinctive melting-and-boiling points describe methods of purification by the use of a suitable solvent, filtration, crystallisation, re-crystallisation and distillation (including use of fractionating column) describe petroleum as a mixture of hydrocarbons and its separation into useful fractions by fractional distillation name the uses of the fractions: petrol fraction as fuel in cars; paraffin fraction for oil stoves and aircraft fuel; diesel fraction for fuel in diesel engines; lubricating fraction for lubricants and making waxes and polishes; bitumen for making roads Suggestions for practical work: Experimental Techniques: Practical suggestions: describe methods of purification describe paper chromatography prepare a sample of soluble salt prepare a sample of insoluble salt investigate the component of food colouring (OHP pens, ink, leaf or flower petal colour) NSSCO Physical Science Syllabus NIED

29 TOPIC 2. Atoms, Elements, Molecules and Compounds 2.1 Atomic structure and the Periodic Table 2.2 Bonding: the structure of matter Ions and ionic bonding GENERAL OBJECTIVES Learners will: know and understand the different aspects of atomic structure and the Periodic table know and understand the different types of bonding SPECIFIC OBJECTIVES Learners should be able to: state the relative charge, approximate relative mass and atomic mass of a proton, a neutron and an electron and their position in the atom define proton number (Z) of an element as the number of protons in the nucleus of each atom of that element define nucleon number (A) or mass number of an element as number of protons and neutrons (together called nucleons) in the nucleus use proton number and the simple structure of atoms to explain the basis of the Periodic Table (section 6.1 to 6.4), with special reference to the elements of proton number 1 to 20 use the notation A ZX for an atom describe the build-up of electrons in shells and (The ideas of the distribution of electrons in s- and p-orbitals and in d-block elements are not required. (Note that a copy of the Periodic Table, will be provided in Papers 1, 2 and 3) deduce the structure of atoms and ions from given proton and nucleon numbers define isotopes as atoms with the same proton number but different nucleon numbers describe the differences between elements, mixtures, molecules and compounds, and between metals and non-metals (6.1) describe alloys, such as brass, bronze and steel, as mixtures of a metal with other elements describe the formation of ions (cations and anions) by electron transfer describe the formation of ionic compounds between the metals and the halogens, and between metals and non-metallic elements as electrostatic attraction of cations and anions describe the formation of a lattice of ionic compound using NaCl as example NSSCO Physical Science Syllabus NIED

30 TOPIC Molecules and covalent bonds GENERAL OBJECTIVES Learners will: SPECIFIC OBJECTIVES Learners should be able to: describe the formation of single covalent bonds in H 2, Cl 2, H 2 O, CH 4 and HCl as the sharing of pairs of electrons leading to the noble gas configuration describe the electron arrangement in more complex covalent molecules such as N 2, C 2 H 4, CH 3 OH and CO 2 state that the forces between atoms in covalent molecules are stronger than the intermolecular forces between molecules compare (with regards to inter-forces) the differences in volatility, solubility, melting/boiling points and electrical conductivity between ionic and covalent compounds use Bohr, Lewis and Cooper notation to illustrate ionic and covalent bonding Macromolecules describe the structure of graphite and of diamond describe the structure of silicon oxide Metallic bonding describe metallic bonding as a lattice of positive ions in a sea of electrons and use this to explain and describe the electrical conductivity and malleability of metals compare the bonding structures of metals to the melting point, conductivity and hardness Suggestions for practical work: Atoms, Elements, Molecules and Compounds Practical suggestions: describe the structure of graphite and of diamond build a model to illustrate the structure of graphite and diamond NSSCO Physical Science Syllabus NIED

31 TOPIC GENERAL OBJECTIVES Learners will: 3. Stoichiometry know terminology and calculation used in stochiometric calculations 4. Chemical reactions 4.1 Production of energy understand the production of energy, energetics and speed of reactions understand the production of energy SPECIFIC OBJECTIVES Learners should be able to: use the symbols of the elements and write the formulae of simple compounds deduce the formula and name of a simple compound from the relative numbers of atoms present determine the formula of an ionic compound from the charges on the ions present construct word equations and simple balanced chemical equations define relative atomic mass, A r, of an atom as the ratio of the average mass of one atom of the naturally-occurring atom to 1/12 of the mass of a carbon-12 atom define relative formula mass M r, of a molecule or chemical compound as the ratio of the average mass of one molecule or compound in the simplest form, of the naturally-occurring atom to 1/12 of the mass of a carbon-12 atom (Note: The term relative molecular mass, M r, may be used for molecules) state the relative formula mass of the molecule or compound in the simplest form, is the sum of the relative atomic masses of all atoms present in that molecule calculate it as the sum of the relative atomic masses /relative formula mass deduce the balanced equation of a chemical reaction, given relevant information define concentration in g/dm 3 and mol/ dm 3 (Note: The word molarity expresses the concentration of a solution only in mol/ dm 3 and is no longer in use) calculate stoichiometric reacting masses and volume of gases (taking the molar gas volume as 24dm 3 at room temperature and pressure rtp) calculate stoichiometric reacting masses and volume of solutions, solution concentrations being expressed in g/dm 3 or mol/dm 3, (calculations based on limiting reactants may be set (questions on the gas laws and the conversion of gaseous volumes to different temperatures and pressures will not be set) describe the production of heat energy by burning fuels describe hydrogen as a form of fuel describe radioactive isotopes, such as U, as a source of energy (reference to isotopes) NSSCO Physical Science Syllabus NIED

32 TOPIC 4.2 Energetics of a reaction GENERAL OBJECTIVES Learners will: understand energetics of reactions SPECIFIC OBJECTIVES Learners should be able to: describe the meaning of exothermic and endothermic reactions describe bond breaking as endothermic and bond forming as exothermic state that light can provide the energy needed for a chemical reaction to occur (such as production of silver from silver chloride) state that photosynthesis leads to the production of glucose from carbon dioxide and water in the presence of chlorophyll and sunlight (energy) describe the use of silver salts in photography (i.e. reduction of silver ions to silver) 4.3 Rate of reaction know speed of reactions define catalyst as a substance, which accelerates or retards the rate of a chemical reaction. The catalyst participates in the reaction but is chemically unchanged at the end of it, although it may change physically describe the effects of concentration, particle size (surface area), catalysts (including inorganic or organic) and temperature and light on the speeds (rate) of reactions state that organic compounds that catalyse organic reactions are called enzymes describe the application of the above factors to the danger of explosive combustion with fine powders (e.g. flour mills and mines) describe experiments for investigation of the effects of given variables on the rate of reaction interpret data obtained from experiment concerned with rate of reaction 4.4 Redox know oxidation numbers in redox reaction define oxidation and reduction in terms of oxygen gain/loss and in terms of the transfer of electrons relate to oxidation numbers in redox reaction identifying reducing and oxidising agents (including the extraction of metals) Suggestions for practical work: Chemical Reactions: Practical suggestions: describe the production of heat energy by burning fuels describe effect of concentration, particle size, catalyst and temperature on speed of reaction investigate how much energy can be obtained from burning of methylated spirits investigate factors determining speed of reaction between metal or metal carbonate and diluted acid NSSCO Physical Science Syllabus NIED

33 TOPIC 5. Acids, bases and salts 5.1 The characteristic properties of acids and bases GENERAL OBJECTIVES Learners will: understand characteristics and properties of acids and bases 5.2 Types of oxides recognise the different types of oxides 5.3 Preparation of salts know the preparation methods of common salts SPECIFIC OBJECTIVES Learners should be able to: describe the characteristic properties of acids as reactions with metals, bases, carbonates and effect on litmus and Universal Indicator define acids and bases in terms of proton transfer, limited to aqueous solutions use these ideas to explain specified reactions as acid/base explain difference between alkalis and bases define ph as a scale ranging from 1 to 14 describe neutrality and relative acidity and alkalinity in terms of ph (whole numbers only) (measured using Universal Indicator paper) explain the difference between weak/strong acids and concentrated/diluted acids classify oxides as acidic, basic, neutral or amphoteric, related to the metallic, non-metallic or metalloid character of the element forming the oxide (amphoteric ZnO, Al 2 O 3, PbO and H 2 O and neutral CO & NO) describe the preparation, separation and purification of salts as examples of some of the techniques specified in section 1 and the reactions specified in section 6.1 state solubility rules : - all common sodium, potassium and ammonium salts are soluble - all nitrates are soluble - lead compounds are insoluble (except the nitrate and ethanoate) - hydroxides are insoluble (except for Group 1 and barium hydroxides, calcium hydroxides slightly soluble) - carbonates are insoluble (except for sodium, potassium and ammonium carbonates) - common chlorides are soluble (except silver and lead chloride) - common sulphates are soluble (except barium sulphate, calcium sulphate is slightly soluble) suggest a method of making a given salt from suitable starting materials, given appropriate information, including precipitation NSSCO Physical Science Syllabus NIED

34 TOPIC 5.4 Identification of ions Note: the notes for use in qualitative analysis on page 51 will be supplied with paper Identification of gases GENERAL OBJECTIVES Learners will: realise the importance of chemical identifications of ions and gases SPECIFIC OBJECTIVES Learners should be able to: use of ion identification in qualitative analysis describe the use of the following tests to identify: aqueous cations: ammonium, zinc, copper(ii), iron(ii) and iron(iii) using aqueous sodium hydroxide and aqueous ammonia as appropriate. (Formulae of complex ions are not required) aqueous anions: carbonate (by reaction with dilute acid and then with limewater), chloride (by reaction under acidic conditions with aqueous silver nitrate), iodide (by reaction under acidic conditions with aqueous lead(ii) nitrate), nitrate (by reduction with aluminium to ammonia) and sulphate (by reaction under acidic conditions with aqueous barium ions) describe the use of the following tests to identify: ammonia (using damp red litmus paper), carbon dioxide (using limewater), chlorine (using damp litmus paper), hydrogen (using a lighted splint), oxygen (using a glowing splint) describe a chemical test for water (using cobalt(ii) chloride paper) Suggestions for practical work: Acids, bases and salts: Practical suggestions: describe characteristic properties of acid as reaction with metals, bases, carbonates and their effect on litmus describe the use of tests to identify aqueous cations and anions describe the use of tests to identify ammonia, carbon dioxide, chlorine, hydrogen and oxygen carry out titration of an acid and a base using a suitable indicator to determine the endpoint carry out all tests as listed on the data sheet in the syllabus carry out some tests to identify the cation and anion in an unknown sample of a soluble salt carry out all tests as listed on the data sheet in the syllabus carry out all tests to identify the unknown gas released in a certain reaction NSSCO Physical Science Syllabus NIED

35 TOPIC 6. The Periodic Table GENERAL OBJECTIVES Learners will: appreciate periodic and group trends in the Periodic Table 6.1 Periodic trends relate to trends in the Periodic Table SPECIFIC OBJECTIVES Learners should be able to: describe the Periodic Table as a method of classifying elements and describe its use in predicting properties of elements describe the change from metallic to non-metallic character across a Period describe the relationship between group number and the number of outer electrons 6.2 Group properties know Group properties describe lithium, sodium and potassium in Group I and II as a collection of relatively soft metals showing a trend in melting point, density and reaction with water describe Group I and II metals form soluble hydroxide with water and cannot be precipitated predict the properties of other elements in the group given data, where appropriate identify trends in other groups given data about the elements concerned describe chlorine, bromine and iodine in Group VII as a collection of diatomic non-metals showing a trend in colour, reactivity, phase state and state their reaction with other halide ions describe the structures and associated uses of the Group IV elements (carbon in diamond and graphite and silicon in sand or glass) and the relative high melting point 6.3 Transition elements know nature and properties of transition elements 6.4 Noble gases know nature and uses of noble gases describe the transition elements as a collection of metals having high densities, high melting points, forming coloured compounds, and which, as elements and compounds, often act as catalysts describe the noble gases as being unreactive describe the use of the noble gases in providing an inert atmosphere (argon in lamps and helium for filling weather balloons) NSSCO Physical Science Syllabus NIED

36 Suggestions for practical work : The Periodic Table: Demonstration suggestions: describe chlorine, bromine and iodine showing a trend in colour, reactivity and their reaction with halide ions investigate the order of reactivity amongst the halogens using their reactions with halide ions NSSCO Physical Science Syllabus NIED

37 TOPIC GENERAL OBJECTIVES Learners will: SPECIFIC OBJECTIVES Learners should be able to: 7. Metals know physical and chemical properties, extraction and uses of metals 7.1 Properties of metals compare the general physical and chemical properties of metals with those of non-metals 7.2 Reactivity series place in order of reactivity (hydrogen), potassium, sodium, calcium, magnesium, zinc, iron, copper by reference to the reactions, if any and where relevant, of the metals with: - water or steam (Note potassium should be only placed in cold water), - dilute hydrochloric acid, - the aqueous ions of other metals deduce an order of reactivity from a given set of experimental results 7.3 Extraction of metals NSSCO Physical Science Syllabus NIED describe the ease in obtaining metals from their ores by relating the elements to the reactivity series name metals that occur native name the main ores of aluminium (Bauxite) and iron (Haematite) name the main Namibian ores of copper (Chalcopyrite), lead (Galena) and uranium (uranium oxide) describe the essential reactions in the extraction of iron from Haematite describe, in outline, the extraction of zinc from zinc blende (zinc sulphide) and of aluminium from pure aluminium oxide 7.4 Uses of metals describe the idea of changing the properties of iron by the controlled use of additives to form steel alloys name the uses of mild steel (car bodies and machinery) and stainless steel (chemical plant and cutlery) state the uses of zinc in galvanising and making brass state the uses of tin in galvanising and making bronze explain how alloying affects the properties of metals name the uses, related to their properties, of copper (electrical wiring and in cooking utensils) and of aluminium (aircraft parts and food containers) describe methods of rust prevention: paint and other coatings to exclude oxygen and galvanising account for the apparent unreactivity of aluminium in terms of the oxide layer adhering to the metal (anodising iron sheets)

38 Suggestions for practical work: Metals Practical suggestions: place in order of reactivity: Ca, Cu, H, Fe, Mg, K, Na and Zn deduce an order of reactivity from a given set of experimental data investigate the reaction of these metals with water, steam or dilute acid in order to place them in order of reactivity investigate the displacement reaction between aqueous metal ions and metals NSSCO Physical Science Syllabus NIED

39 TOPIC 8. Industrial uses and application chemistry 8.1 Metallurgical industrial plants 8.2 Chemical industrial plants GENERAL OBJECTIVES Learners will: relate to simple chemical application in industry know the manufacturing, chemistry and uses of lime and limestone SPECIFIC OBJECTIVES Learners should be able to: describe the manufacture of calcium oxide (lime) from calcium carbonate (limestone) in terms of the chemical reactions involved state some uses of lime and calcium hydroxide (slaked lime) as in treating acidic soil and neutralising acidic industrial waste products describe and explain the importance of the use of lime in controlling acidity in soil state the use of calcium carbonate (e.g. Marble Mining at Karibib), and in the manufacturing of iron and of cement (e.g. Otjiwarongo Cement Works) describe a physical and chemical test for water state the sources of temporary and permanent hardness and the methods to soften hard water (boiling, chemically by washing soda or ion exchanger) describe the extraction of salt and table salt in salt works (Swakopmund and Walvis Bay) state and describe that hydration may be reversible (e.g. by heating hydrated copper(ii) sulphate or hydrated cobalt(ii) chloride) describe, in outline, the purification of the water supply in terms of filtration and chlorination name some of the uses of water in industry and in the home describe the composition of clean air as being approximately 79% nitrogen, 20% oxygen and the remainder as being a mixture of noble gases, water vapour and carbon dioxide describe the separation of oxygen and nitrogen from liquid air by fractional distillation name the uses of oxygen in oxygen tents in hospitals, and with acetylene, a hydrocarbon, in welding describe petroleum as a mixture of hydrocarbons and its separation into useful fractions by fractional distillation state the uses of the fractions as: petrol fraction as fuel in cars; paraffin fraction for oil stoves and aircraft fuel; diesel fraction for fuel in diesel engines; lubricating fraction for lubricants and making waxes and polishes; bitumen for making roads NSSCO Physical Science Syllabus NIED

40 TOPIC GENERAL OBJECTIVES Learners will: SPECIFIC OBJECTIVES Learners should be able to: describe the formation of carbon dioxide: - as a product of complete combustion of carbon-containing substances - as a product of respiration - as a product of the reaction between an acid and a carbonate Suggestions for practical work: Industrial uses and application chemistry: Practical suggestions: distinguish between limestone, lime and slaked lime test for the presence of water investigate the chemical properties of limestone, lime and slaked lime investigate for the presence of water NSSCO Physical Science Syllabus NIED

41 TOPIC 9. Organic Chemistry GENERAL OBJECTIVES Learners will: know the names, chemistry and structure of simple organic compounds 9.1 Nomenclature know the names of simple organic compounds Names of compounds Homologous series 9.2 Alkanes understand the basic chemistry of alkanes 9.3 Alkenes understand the basic chemistry of alkenes 9.4 Alcohols understand the basic chemistry of alcohols 9.5 Simple Esters understand the basic chemistry of esters SPECIFIC OBJECTIVES Learners should be able to: - name and draw the structures of methane, ethene, ethane, ethanol, ethanoic acid, ethyl ethanoate and the products of the reactions stated in section 9.4 to state the type of compound (functional group) present given a chemical name, ending in ane, -ene, -ol, or oic acid or a molecular structure name the fuels coal, natural gas and petroleum name methane as the main constituent of natural gas describe the concept of homologous series as a family of similar compounds with similar properties due to the presence of the same functional group (chemical properties) and the changing in physical properties (required in fractional distillation). describe the properties of alkanes (exemplified by methane) as being generally unreactive, except in terms of combustion (both complete and incomplete reaction) to produce CO 2 and CO) describe the properties of alkenes in terms of addition reactions with bromine, hydrogen and steam describe the manufacture of alkenes and of hydrogen by cracking distinguish between saturated and unsaturated hydrocarbons from molecular structures, by simple chemical tests (bromine and potassium permanganate) describe the formation of poly (ethene) as an example of addition polymerisation of monomer units describe the formation of ethanol by fermentation and by the catalytic addition of steam to ethene state the uses of ethanol as a solvent as a fuel and as a constituent of wine and beer describe the formation of ethanoic acid with ethanol to give an ester (restricted to reaction of ethyl ethanoate) state uses of esters (e.g. flavours and fragrances) NSSCO Physical Science Syllabus NIED

42 Suggestions for practical work: Organic chemistry: Practical suggestions: describe the separation into useful fractions by fractional distillation carry out fractional distillation of a sample of wine/ fermented sugar solution/ fruit juice TOPIC 10. Environmental Chemistry GENERAL OBJECTIVES Learners will: evaluate the economic advantages of industry with respect to ecological and social impact SPECIFIC OBJECTIVES Learners should be able to: investigate for the presence of water using anhydrous copper sulphate or cobalt chloride investigate whether or not a clear colourless liquid is water by determining melting and boiling points state the common pollutants in the air as being carbon monoxide, sulphur dioxide, oxides of nitrogen and lead compounds state the source of each of these pollutants: - carbon monoxide from the incomplete combustion of carbon-containing substances - sulphur dioxide from the combustion of fossil fuels which contain sulphur compounds (leading to acid rain ) - oxides of nitrogen and lead compounds from car exhausts explain the catalytic removal of nitrogen oxides from car exhaust gases state the adverse effect of common pollutants on buildings and on health describe the need for nitrogen-, phosphorous- and potassium-containing fertilisers discuss the dangers of over use of fertilisers with reference to the effect on soil and water resources evaluate the dangers of dumping identify dangerous chemicals in dumping sites investigate the effects of the dangerous chemicals on the environment NSSCO Physical Science Syllabus NIED

43 5. ASSSESSMENT OBJECTIVES The assessment will include, wherever appropriate, personal, social, environmental, economic and technological applications of Physical Science in modern society. Learners are required to demonstrate the assessment objectives in the context of the content and skills prescribed. Within each of the Assessment Objectives the assessment must take account of the learners ability to communicate clearly and logically and apply conventions where appropriate. The three Assessment Objectives in Physical Science are: A B C Knowledge with understanding Handling information, application and solving problems Practical (experimental and investigative) skills and abilities Following is a description of each Assessment Objective: A KNOWLEDGE WITH UNDERSTANDING Learners should be able to demonstrate knowledge and understanding in relation to: A1. scientific phenomena, facts, laws, definitions, concepts and theories; A2. scientific vocabulary, terminology and conventions, (including symbols, quantities, units); A3. scientific instruments and apparatus, including techniques of operation and aspects of safety; A4. scientific quantities and their determination; A5. scientific and technological applications with their social, economic and environmental implications. The Learning Content defines what learners may be required to recall and explain. Questions testing assessment objectives will often begin with one of the following words: define, name, list, indicate, give examples, state, describe, compare, explain, distinguish, outline and give reasons. B HANDLING INFORMATION, APPLICATION AND SOLVING PROBLEMS Learners should be able to, in word or using other written forms of presentation (i.e. symbolic, graphical and numerical) to: B1. locate, select, organise and present information from a variety of sources; B2. translate information from one form to another; B3. manipulate numerical and other data; B4. use information to identify patterns, report trends and draw inferences; B5. present reasoned explanations for phenomena, patterns and relationships; B6. make predictions and hypotheses; B7. solve quantitative and qualitative problems as they relate to everyday life. These skills cannot be precisely specified in the Learning Content, because questions testing such skills are often based on information that is unfamiliar to the learner. In answering such questions, learners are required to use principles and concepts that are within the syllabus and apply them in a logical, deductive manner to a novel situation. Questions testing these objectives will often begin with one of the following words: discuss, deduce, compare and discuss, find, estimate, interpret, evaluate, sketch, predict, identify, relate, suggest and calculate or determine. NSSCO Physical Science Syllabus NIED

44 C PRACTICAL (experimental and investigative) SKILLS AND ABILITIES Learners should be able to: C1. follow a sequence of instructions; use appropriate techniques; handle apparatus/material competently and have due regard for safety; C2. make and record estimates, observations and measurements accurately; C3. handle and processes experimental observations and data, including dealing with anomalous or inconsistent results; C4. apply scientific knowledge and understanding to make interpretations and to draw appropriate conclusions from practical observations and data; C5. plan, design and carry out investigations (based on concepts familiar to learners) and suggest modifications in the light of experience. 6. SCHEME OF ASSESSMENT All learners should be entered for Papers 1, 2 and 3 which are compulsory papers. All learners should take a practical paper (Paper 3 Applied Practical Skills). School-Based Assessment of Practical Skills and Abilities will be introduced eventually allowing learners a choice of School-Based Assessment of Practical Skills and Abilities instead of Paper 3. DESCRIPTION OF PAPERS Paper 1 (1 hour) (40 marks) This paper will consist of forty multiple-choice items of the four-choice type. The questions will be based on the content described as specific objectives and will test abilities in assessment objectives A and B. Learners should attempt all questions Paper 2 (2 hours) (100 marks) This paper will consist of compulsory short-answer, structured and free-response questions. The questions will test skills and abilities mainly in Assessment Objectives A and B, but may include the testing of skills in Assessment Objectives C. The last question of this paper will be a question (about 10 marks) set entirely on environmental issues. Assessment of Practical Skills and Abilities The purpose of this component is to assess appropriate practical skills in Assessment Objective C. Paper 3 Applied Practical Skills Paper (1 hour 30 minutes) (60 marks) A written paper of compulsory questions designed to test familiarity with practical laboratory procedures and will test skills mainly in assessment objective C, but may include the assessment of objectives A and B. This implies that learners must be exposed to practical work and demonstrations The notes for use in qualitative analysis on page 51 will be supplied with paper 3. NSSCO Physical Science Syllabus NIED

45 WEIGHTING OF PAPERS All learners will be entered for Papers 1, 2 and 3 specified below. Learners will be graded from A* - G depending on their abilities and achievements. Weighting of papers Paper 1 Paper 2 Paper 3 (Applied Practical Skills Paper) 20% 50% 30% NOTE ON FUTURE CHANGES REGARDING COURSEWORK (School-Based Assessment of Practical skills and abilities) School-Based assessment (60 marks) of the experimental skills described at end of syllabus will eventually be introduced allowing learners a choice of School-Based Assessment of Practical skills instead the Applied to Practical Skills Paper. The Applied to Practical Skills (Paper 3) option is compulsory. Centres may not enter learners for School-based assessment without the written approval of the National Examination, Assessment and Certification Board after the coursework option was introduced. This will only be given to teachers who satisfy requirements concerning moderation and they will have to undergo in-service training in assessment before entering learners. When introduced, each skill can be assessed on a maximum of four occasions, and the marks for the two best assessments for each skill should be submitted. Meanwhile the teachers can use the forms for internal assessment of skills. NSSCO Physical Science Syllabus NIED

46 7. SPECIFICATION GRID The approximate weightings allocated to each of the Assessment Objectives across the papers are summarised in the table below: Assessment Objective Weighting across all components A B C Knowledge with understanding Handling information, application and solving problems Practical (experimental and investigative) skills and abilities 50% (not more than 25% recall) Paper 1 Paper 2 Paper 3 20 marks 55 marks 25 marks 30% 20 marks 35 marks 5 marks 20% 0 marks 10 marks 30 marks 40 marks 100 marks 60 marks 200 marks NSSCO Physical Science Syllabus NIED

47 8. GRADE DESCRIPTIONS The scheme of assessment is intended to encourage positive achievement by all learners. Grade descriptions are therefore provided for judgmental Grades A, C, E and G to give a general indication of the standards of achievement likely to have been shown by learners awarded particular grades. The description must be interpreted in relation to the content specified by the Physical Science syllabus but are not designed to define that content. The grade awarded will depend in practice upon the extent to which the learner has met the assessment objective overall. Shortcomings in some aspects of the assessment may be balanced by better performance in others. Grade descriptions for Science Subjects will range from A, C, E and G. At Grade A the learner is expected to: recall a wide range of knowledge from all areas of the syllabus use detailed scientific knowledge and understanding in a range of applications relating to scientific systems or phenomena use a wide range of scientific and technical vocabulary throughout their work explain how theories can be changed by new evidence and identify some areas of uncertainty in science select and collate information from a number of sources and present it in a clear, logical form solve problems in situations that may involve a wide range of variables process data from a number of sources to identify patterns or trends generate a hypothesis to explain facts, or find facts to support a hypothesis. At Grade C the learner is expected to: recall a range of scientific information from all areas of the syllabus use and apply scientific knowledge and understanding in some general contexts use appropriate scientific and technical vocabulary in a range of contexts explain how scientific theories can be modified by new scientific evidence select a range of information from a given source and present it in a clear, logical form identify patterns or trends in given information solve problems involving more than one step, but with a range of variables generate a hypothesis to explain a given set of facts or data At Grade E the learner is expected to: recall a range of information, using basic concepts, principles and theories use and apply knowledge and understanding some specific every day contexts make some use of scientific and technical vocabulary to make simple generalisations from information recognise how scientific explanations can be derived from experimental evidence select basic information from a given source and present it fairly solve a problem involving one step or more with minimum assistance identify a few patterns or trends where manipulation of data is needed differentiate between two hypotheses which explain a set of data At Grade G the learner is expected to: recall a limited range of information, using basic concepts, principles and theories make use of limited scientific vocabulary, recall basic concepts, principles and theories apply some scientific and technical vocabulary to make simple generalisations from information recognise how simple explanations can be derived from experimental evidence select and present a single piece of information from a given source NSSCO Physical Science Syllabus NIED

48 9. GLOSSARY OF TERMS USED IN SCIENCE PAPERS It is hoped that the glossary (which is relevant only to Science subjects) will prove helpful to Learners as a guide, i.e. it is neither exhaustive nor definitive. The glossary has been deliberately kept brief not only with respect to the number of terms included but also to the descriptions of their meanings. Learners should appreciate that the meaning of a term must depend in part on its context. 1. Define (the term(s) ) is intended literally, only a formal statement or equivalent paraphrase being required. 2. What do you understand by/what is meant by (the term(s).) normally implies that a definition should be given, together with some relevant comment on the significance or context of the term(s) concerned, especially where two or more terms are included in the question. The amount of supplementary comment intended should be interpreted in the light of the indicated mark value. 3. State implies a concise answer with little or no supporting argument, e.g. a numerical answer that can readily be obtained by inspection. 4. List requires a number of points, generally each of one word, with no elaboration. Where a given number of points is specified, this should not be exceeded. 5. Explain may imply reasoning or some reference to theory, depending on the context. In other contexts, describe should be interpreted more generally, i.e. the learner has greater discretion about the nature and the organisation of the material to be included in the answer. Describe and explain may be coupled, as may state and explain. 7. Discuss requires the learner to give a critical account of the points involved in the topic. 8. Outline implies brevity, i.e. restricting the answer to giving essentials. 9. Predict implies that the learner is not expected to produce the required answer by recall but by making a logical connection between other pieces of information. Such information may be wholly given in the question or may depend on answers extracted in an earlier part of the question. Predict also implies a concise answer, with no supporting statement required. 10. Deduce is used in a similar way to predict except that some supporting statement is required, e.g. reference to a law or principle, or the necessary reasoning is to be included in the answer. 11. Suggest is used in two main contexts, i.e. either to imply that there is no unique answer (e.g. in Chemistry, two or more substances may satisfy the given conditions describing an unknown ), or to imply that Learners are expected to apply their general knowledge to a novel situation, one that may be formally not in the syllabus. 12. Find is a general term that may variously be interpreted as calculate, measure, determine, etc. 13. Calculate is used when a numerical answer is required. In general, working should be shown, especially where two or more steps are involved. 14. Measure implies that the quantity concerned can be directly obtained from a suitable measuring instrument, e.g. length, using a rule, or mass, using a balance. 15. Determine often implies that the quantity concerned cannot be measured directly but is obtained by calculation, substituting measured or known values of other quantities into a standard formula, e.g. relative molecular mass. 16. Estimate implies a reasoned order of magnitude statement or calculation of the quantity concerned, making such simplifying assumptions as may be necessary about points of principle and about the values of quantities not otherwise included in the question. 17. Sketch, when applied to graph work, implies that the shape and/or position of the curve need only be qualitatively correct, but learners should be aware that, depending on the context, some quantitative aspects may be looked for, e.g. passing through the origin, having an intercept, asymptote or discontinuity at a particular value. In diagrams, sketch implies that a simple, freehand drawing is acceptable; nevertheless, care should be taken over proportions and the clear exposition of important details. 18. Analyse is used when information should be examined to discover patterns or relationships. NSSCO Physical Science Syllabus NIED

49 19. Interpret implies that the candidate should use reasoning or some reference to theory, depending on the context. 20. Study implies that the information provided or data should be used to investigate a problem in a systemic way. NSSCO Physical Science Syllabus NIED

50 ANNEXURES A. ASSESSMENT CRITERIA FOR PRACTICAL ASSESSMENT Scientific subjects are, by their nature, experimental. It is, accordingly, important that an assessment of a learner s knowledge and understanding of Physical Science should contain a component relating to practical work and experimental skills (as identified by assessment objective C). In order to accommodate, within NSSCO, differing circumstances such as the availability of resources three alternative means of assessing assessment objective C are provided, namely, school-based assessment, a formal practical test, and a written alternative to practical paper, as outlined in the scheme of assessment. PAPER 3, Applied to Practical Skills Paper This paper is designed to test the learner s familiarity with laboratory practical procedures. Questions may be set requiring the Learners to: (a) describe in simple terms how they would carry out practical procedures; (b) explain and/or comment critically on described procedures or points of practical detail; (c) follow instructions for drawing diagrams; (d) draw, complete and/or label diagrams of apparatus; (e) take readings from their own diagrams, drawn as instructed, and/or from printed diagrams including reading a scale with appropriate precision/accuracy with consistent use of significant figures and with appropriate units, interpolating between scale divisions, taking repeat measurements to obtain an average value; (f) process data as required, complete tables of data; (g) present data graphically, using suitable axes and scales (appropriately labelled) and plotting the points accurately; (h) take readings from a graph by interpolation and extrapolation; (i) determine a gradient, intercept or intersection on a graph; (j) report a conclusion or result clearly; (k) identify and/or select, with reasons, items of apparatus to be used for carrying out practical procedures; (l) explain, suggest and/or comment critically on precautions taken and/or possible improvements to techniques and procedures; (m) describe the tests for gases and ions, and/or draw conclusions from such tests. (Notes for Use in Qualitative Analysis, will be provided in the question paper) NSSCO Physical Science Syllabus NIED

51 SCHOOL-BASED ASSESSMENT OF PRACTICAL SKILLS AND ABILITIES Teachers may not undertake school-based assessment without the written approval of the National Examination and Assessment Certification Board. This will only be given to teachers who satisfy requirements concerning moderation and they will have to undergo special training in assessment before entering learners. Experimental work forms and integral part of the NSSCO Physical Science course. The practical aspects to be assessed are outlined in Assessment Objective C. It is important that these skills are covered during the teaching program. The following scheme has been devised to enable teachers to develop, assess and record positive achievement in experimental skills. Five practical skills have been identified in order that assessment may be carried out as precisely as possible. The skills are discrete but should not be regarded as being performed in isolation. It is assumed that there has been a background of practical work carried out during the first three years of secondary education. Thus, it is reasonable to suppose that any single assessment is a representative measure of a given learner s ability. This could be, but may not necessarily be, related to their previous practical experiences. The practical skills and abilities, C1 to C5, to be assessed are given below: C1. Following sequence of instructions; using appropriate techniques; handling apparatus/material competently and having due regard for safety. C2. Making and recording estimates, observations and measurements accurately. C3. Handling and processing experimental observations and data, including dealing with anomalous or inconsistent results. C4. Applying scientific knowledge and understanding to make interpretations and to draw appropriate conclusions from practical observations and data. C5. Planning, designing and carrying out investigations (based on concepts familiar to learners) and suggest modifications in the light of experience. The five skills carry equal weighting. All assessments must be based on practical work carried out by the learners. It is expected that the teaching and assessment of experimental skills will take place throughout the course. Teachers should ensure that they can make available to the moderator evidence for two assessments of each skill for each learner. For skills C1 to C5 inclusive, information about the tasks set and how the marks were awarded will be required. In addition, for skills C2, C3, C4 and C5, the learner s written work will also be required. The assessment scores finally recorded for each skill must represent the learner s best performances. For learners who miss the assessment of a given skill through no fault of their own, for example because of illness, and who cannot be assessed on another occasion, the procedure approved by the National Examination and Assessment Certification Board for special consideration should be followed. However, learners who for no good reason absent themselves from an assessment of a given skill should be awarded a mark of zero for that assessment. NSSCO Physical Science Syllabus NIED

52 B. CRITERIA FOR ASSESSMENT OF PRACTICAL SKILLS AND ABILITIES Marks (1-6) should be awarded for each of the experimental skills in terms of the Performance Criteria Descriptors. Each skill must be assessed on a 6-point scale, level 6 being the highest level of achievement. Each of the skills is defined in terms of three levels of achievement at scores 2, 4 and 6. A score of 0 is available if there is no evidence of positive achievement for a skill (i.e. no work is submitted). For learners who do not meet the criteria for a score of 2, a score of 1 is available if there is some evidence of positive achievement. A score of 3 is available for learners who go beyond the level defined for 2, but who do not meet fully the criteria for 4. Similarly, a score of 5 is available for those who go beyond the level defined for 4, but do not meet fully the criteria for following sequence of instructions; using appropriate techniques; handling apparatus/material competently and having due regard for safety 2. making and recording estimates, observations and measurements accurately 3. handling and processing experimental observations and data, including dealing with anomalous or inconsistent results 4. applying scientific knowledge and understanding to make interpretations and to draw appropriate conclusions from practical observations and data 5. planing, designing and carrying out investigations (based on concepts familiar to learners) and suggest modifications in the light of experience SKILL C1 Following sequence of instructions; using appropriate techniques; handling apparatus /material competently and having due regard for safety Follows written, diagrammatic or oral instructions to perform a single practical operation. 1 or 2 Uses familiar apparatus and materials adequately, needing reminders on points of safety. Follows written, diagrammatic or oral instructions to perform an experiment involving a series of step-by-step practical operations. Uses familiar apparatus, materials and techniques adequately and safely. Follows written, diagrammatically or oral instructions to perform an experiment involving a series of practical operations where there may be a need to modify or adjust one step in the light of the effect of a previous step. Uses familiar apparatus, materials and techniques methodically, correctly and safely, with the minimum amount of help. 3 or 4 5 or 6 SKILL C2 Making and recording estimates, observations and measurements accurately Makes observations or readings, given detailed instructions. 1 or 2 Record results in an appropriate manner, given a detailed format. Make relevant observations or measurements, given an outline format or brief guideline. Records results in an appropriate manner, given an outline format. Makes relevant observations or measurements to a degree of accuracy appropriate to the instruments or techniques used. Records results in an appropriate manner, given no format. NSSCO Physical Science Syllabus NIED or 4 5 or 6

53 SKILL C3 Handling and processing experimental observations and data; including dealing with anomalous or inconsistent results Processes results in an appropriate manner, given a detailed format. 1 or 2 Processes results in an appropriate manner, given an outline format. 3 or 4 Recognises and comments on anomalous results. Processes results in an appropriate manner, given no format. 5 or 6 Recognises and comments on possible sources of experimental error. Deals appropriately with anomalous or inconsistent results. SKILL C4 Applying scientific knowledge and understanding to make interpretations and to draw appropriate conclusions from practical observations and data Requires help in identifying patterns from data collected. 1 or 2 Applies some scientific knowledge to draw an obvious qualitative conclusion fro results of an experiment. Deduces a simple pattern in data without help. Applies scientific knowledge and understands to draw qualitative conclusions that are consistent with obtained results. Attempts to make appropriate predictions, where appropriate. Deduces generalisations or patterns from data. Applies scientific knowledge and understanding to draw relevant qualitative conclusions that are consistent with obtained results. Makes a prediction about the outcome of the investigation, explaining it using appropriate scientific terminology. 3 or 4 5 or 6 SKILL C5 Planning, designing and carrying out investigations (based on concepts familiar to learners) and suggest modifications in the light of experience. Suggests a simple experimental strategy to investigate a given practical problem. 1 or 2 Attempts trial and error modification in the light of the experimental work carried out. Specifies a sequence of activities to investigate a given practical problem, identifying appropriate apparatus, taking into account the need for safe working. In a situation where there are two variables, recognises the need to keep one constant while the other is being changed (fair testing). Comments critically on the original plan, and implements appropriate changes in the light of the experimental work carried out. Analyses a practical problem systematically and specifies a sequence of activities to investigate a given practical problem, identifying equipment that will allow the collection of results to an appropriate degree of accuracy. Identifies the possible variables in the investigation and plans a strategy to keep these constant, except the variable under test. Describes a suitable way of varying the variable under test. Evaluates chosen procedures, suggests or implements modifications where appropriate and shows a systematic approach in dealing with unexpected results NSSCO Physical Science Syllabus NIED or 4 5 or 6

54 C. EXPLANATORY NOTES FOR GUIDANCE The following notes are intended to provide teachers with information to help them to make valid and reliable assessments of the skills and abilities of their learners. The assessments should be based on the principle of positive achievement; learners should be given opportunities to demonstrate what they understand and can do. It is expected that learners will have had opportunities to acquire a given skill before assessment takes place. It is not expected that all of the practical work undertaken by a learner will be assessed. Assessments can be carried out at any time during the course. However, at whatever stage assessments are done, the standards applied must be those expected at the end of the course, as exemplified in the criteria for the skills. Assessments should be made by the person responsible for teaching the learners. It is recognised that a given practical task is unlikely to provide opportunities for all aspects of the criteria at a given level for a particular skill to be satisfied, for example, there may be any anomalous results (Skill C5). However, by using a range of practical work, teachers should ensure that opportunities are provided for all aspects of the criteria to be satisfied during the course. The educational value of extended experimental investigations is widely recognised. Where such investigations are used for assessment purposes, teachers should make sure that the learners have ample opportunity for displaying the skills and abilities required by the scheme of assessment. It is not necessary for all learners at a Centre, or in a teaching group within a Centre to be assessed on exactly the same practical work, although teachers may well wish to make use of work that is undertaken by all their learners. When an assessment is carried out on group work, the teacher must ensure that the individual contribution of each learner can be assessed. Skill C1 may not generate a written product from the learners. This will be assessed through observing learners while they are conducting the practical. Skills C2, C3, C4 and C5 will usually generate a written product from the learners. This product will provide evidence for moderation. Raw scores for individual practical assessments should be recorded on the Individual Learner Record Card. The final, internally moderated total score should be recorded on the Coursework Assessment Summary Form. Examples of both forms, plus the Sciences Experiment Form, are shown at the back of this syllabus Annexures 7, 8 and 10. Raw scores for individual practical assessments may be given to learners as part of the normal feedback from the teacher. The final, internally moderated total mark should not be given to the learner. NSSCO Physical Science Syllabus NIED

55 MODERATION Internal Moderation When several teachers in a centre are involved in internal assessments, arrangements must be made within the centre for all learners to be assessed to a common standard. It is essential that, within each centre, the marks for each skill assigned within different teaching groups (e.g. different classes) are moderated internally for the whole centre entry. The centre assessments will then be subject to external moderation. NSSCO Physical Science Syllabus NIED

56 D. NOTES FOR USE IN QUALITATIVE ANALYSIS Tests for anions anion test test result carbonate (CO 2-3 ) add dilute acid effervescence, chloride (Cl - ) [in solution] iodide (I - ) [in solution] nitrate (NO - 3 ) [in solution] sulphate (SO 2-4 ) [in solution] acidify with dilute nitric acid, then add aqueous silver nitrate acidify with dilute nitric acid, then add aqueous silver nitrate add aqueous sodium hydroxide, then aluminium foil; warm carefully acidify with dilute nitric acid, then add aqueous barium nitrate carbon dioxide produced white ppt. yellow ppt. ammonia produced white ppt. Tests for aqueous cations cation effect of aqueous sodium hydroxide effect of aqueous ammonia Aluminium (Al 3+ white ppt., soluble in excess, giving a ) colourless solution white ppt., insoluble in excess calcium (Ca 2+ ) white ppt., soluble in excess no ppt,, or very slight white ppt. ammonium (NH + 4 ) ammonia produced on warming copper(ii) (Cu 2+ ) light blue ppt., insoluble in excess light blue ppt., soluble in excess, giving a dark blue solution iron(ii) (Fe 2+ ) green ppt., insoluble in excess green ppt., insoluble in excess iron(iii) (Fe 3+ ) red-brown ppt., insoluble in excess red-brown ppt., insoluble in excess zinc (Zn 2+ ) white ppt., soluble in excess, giving a colourless solution white ppt., soluble in excess, giving a colourless solution NSSCO Physical Science Syllabus NIED

57 Tests for gases gas ammonia (NH 3 ) carbon dioxide (CO 2 ) chlorine (Cl 2 ) hydrogen (H 2 ) oxygen (O 2 ) test and test result turns damp red litmus paper blue turns lime water milky bleaches damp litmus paper pops with a lighted splint relights a glowing splint NSSCO Physical Science Syllabus NIED

58 3 E. DATA SHEET: THE PERIODIC TABLE OF THE ELEMENTS Group I II III IV V VI VII 0 1 H Hydrogen Li Lithium 23 Na Sodium K Potassium Rb Rubidium Cs Caesium 55 Fr Francium 87 9 Be Beryllium 4 24 Mg Magnesium Ca Calcium Sr Strontium Ba Barium Ra Radium 88 *58-71 Lanthanoid series Actinoid series Key b a X 45 Sc Scandium Y Yttrium La Lanthanum 57 * 227 Ac actinium Ti Titanium Zr Zirconium Hf Hafnium 72 a = relative atomic mass X = atomic symbol b = proton (atomic) number 51 V Vanadium Nb Niobium Ta Tantalum Ce Cerium Th Thorium 90 NSSCO Physical Science Syllabus NIED Cr Chromium Mo Molybdenum W Tungsten Pr Praseodymium 59 Pa Protactinium Mn Manganese 25 Tc Technetium Re Rhenium Nd Neodymium 60 U Uranium Fe Iron Ru Ruthenium Os Osmium 76 Pm Promethium 61 Np Neptunium Co Cobalt Rh Rhodium Ir Iridium Sm Samarium 62 Pu Plutonium Ni Nickel Pd Palladium Pt Platinum Eu Europium 63 Am Americium Cu Copper Ag Silver Au Gold Gd Gadolinium 64 Cm Curium Zn Zinc Cd Cadmium Hg Mercury Tb Terbium 65 Bk Berkelium B Boron 5 27 Al Aluminium Ga Gallium In Indium Tl Thallium Dy Dysprosium 66 Cf Californium C Carbon 6 28 Si Silicon Ge Germanium Sn Tin Pb Lead Ho Holmium 67 Es Einsteinium 99 The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.). 14 N Nitrogen 7 31 P Phosphorus As Arsenic Sb Antimony Bi Bismuth Er Erbium 68 Fm Fermium O Oxygen 32 S Sulphur Se Selenium Te Tellurium 52 Po Polonium Tm Thulium 69 Md Mendeleviu m F Fluorine 35.5 Cl Chlorine Br Bromine I Iodine 53 At Astatine Yb Ytterbium 70 No Nobelium He Helium 20 Ne Neon Ar Argon Kr Krypton Xe Xenon 54 Rn Radon Lu Lutetium 71 Lr Lawrencium 103

59 F. UNITS OF PHYSICAL QUANTITIES 1. Numbers The decimal point will be placed on the line, e.g Numbers from 1000 to 9999 will be printed without commas or spaces. Numbers greater than or equal to will be printed without commas. A space will be left between each group of three whole numbers, e.g Units Learners should be able to state the symbols for the following physical quantities and where indicated, state the units in which they are measured. The acceptable methods of stating units will be (e.g. metres per second or m per s) be written as m/s or m s -1 (Note: the solidus (/) will be used for a quotient and indicate units in labels of tables and graphs e.g. distance/cm). Quantity Name of unit Symbol for unit length kilometre km metre m centimetre cm millimetre mm mass tonne (1000 kg) Mg kilogram kg gram g milligram mg weight Newton N time year y day d hour h minute min second s (not sec) amount of substance mole mol area hectare = 10 4 m 2 ha square metre m 2 square decimetre dm 2 square centimetre cm 2 square millimetre mm 2 volume cubic kilometre km 3 cubic metre m 3 cubic decimetre (preferred to dm 3 liter) liter dm 3 (not l) cubic centimetre cm 3 (not ml or cc) cubic millimetre mm 3 density kilogram per cubic metre kg/m 3 gram per cubic centimetre g/cm 3 speed u, v km/h, m/s, cm/s acceleration a m/s 2 acceleration of free fall g N/kg or m/s 2 gravitational field strength g N/kg or m/s 2 force F, P N work done W, E J energy E J power P W temperature t C / K focal length f cm, mm angle of incidence i degree ( ) angle of reflection, r degree ( ) NSSCO Physical Science Syllabus NIED

60 Quantity Name of unit Symbol for unit refraction potential difference/voltage V V, mv current I A, ma (not amps) e.m.f. emf V resistance R Ω NSSCO Physical Science Syllabus NIED

61 G. NSSCO SCIENCES: FORM FOR PRACTICAL ACTIVITIES Please read the instructions printed bottom of this page. Centre Centre Name Number Syllabus Code Syllabus Title Physical Science Component Number 0 Component Title COURSEWORK November 2 0 Experiment Number Practical Skill(s) Assessed INSTRUCTIONS FOR COMPLETING SCIENCE PRACTICAL FORM 1. Complete the information at the top of the form. 2. Use a separate form for each syllabus. 3. Give a brief description of each of the experiments your learners performed for assessment in the NSSCO Physical Science Syllabus. Use additional sheets as necessary. 4. Copies of the Experiment Forms and the corresponding Worksheets/Instructions and Mark Schemes will be required for each assessed task sampled, for each of skills C1 to C5 inclusive. NSSCO Physical Science Syllabus NIED

62 H. NSSCO SCIENCES: Individual Learner Record Card Please read the instructions printed on next page and the General Coursework Regulations before completing this form. Centre Centre Name November Number Learner Number Learner Name Teaching Group/ Set Syllabus Code Syllabus Title Physical Science Component Number Component Title COURSEWORK Date of Assessment Experimental Number from Sciences Experiment Form Assess at least twice: ring highest two marks for each skills (max 6 for each assessment) C1 C2 C3 C4 C5 Relevant comments (for example, if help was given) Marks to be transferred to Coursework Assessment Summary Form (max 12) (max 12) (max 12) (max 12) (max 12) TOTAL (max 60) NSSCO Physical Science Syllabus NIED

63 I. INSTRUCTIONS FOR COMPLETING INDIVIDUAL LEARNER RECORD CARDS 1. Complete the information at the top of the form. 2. Mark each item of Coursework for each learner according to instructions given in the syllabus and in the Distance Training Pack. 3. Enter marks and total marks in the appropriate spaces. Complete any other sections of the form required. 4. Ensure that the addition of marks is independently checked. 5. It is essential that the marks of learners from different teaching groups within each centre are moderated internally. This means that the marks awarded to all learners within a centre must be brought to a common standard by the teacher responsible for co-ordinating the internal assessment (i.e. the internal moderator), and a single valid and reliable set of marks should be produced that reflects the relative attainment of all the learners in the Coursework component at the centre. 6. Transfer the marks to the Coursework Assessment Summary Form in accordance with the instructions given on that document. Note: These Record Cards are to be used by teachers only for learners who have undertaken Coursework as part of their NSSCO. NSSCO Physical Science Syllabus NIED 2009

64 J. NSSCO SCIENCES: Coursework Assessment Summary Form Please read the instructions printed overleaf and the General Coursework Regulations before completing this form. Centre Number Centre Name November Physical Component Syllabus Code Syllabus Title 0 4 Component Title COURSEWORK Science Number Learner Number Learner Name Teaching Group/ Set C1 (max 12) C2 (max 12) C3 (max 12) C4 (max 12) C5 (max 12) Total Mark (max 60) Internally Moderated Mark (max 60) Name of teacher completing this form Signature Date Name of internal moderator Signature Date NSSCO Physical Science Syllabus NIED 2009

65 A. INSTRUCTIONS FOR COMPLETING COURSEWORK ASSESSMENT SUMMARY FORMS 1. Complete the information at the top of the form. 2. List the learners in an order that will allow ease of transfer of information to a computer-printer Coursework Mark Sheet MS1 at a later stage (i.e. in learner index number order, where this is known; see item B.1. below). Show the teaching group or set for each learner. The initials of the teacher may be used to indicate the group or set. 3. Transfer each learner s marks from his or her Individual Learner Record Card to this form as follows: (a) (b) (c) In the columns headed C1, C2, C3, C4 and C5, enter the marks initially awarded (i.e. before internal moderation took place). In the column headed Total Mark, enter the total mark awarded before internal moderation took place. In the column headed Internally Moderated Mark, enter the total mark awarded after internal moderation took place. 4. Both the teacher completing the form and the internal moderator (or moderators) should check the form and complete and sign the bottom portion.. NSSCO Physical Science Syllabus NIED 2009

66 The National Institute for Educational Development P/Bag 2034 Okahandja NAMIBIA Telephone: Facsimile: Website: NIED 2009