7A Practice Papers. Level 3-7. minutes. marks. Page 1 of 36

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1 7A Practice Papers Level 3-7 minutes marks Page 1 of 36

2 Q1. Bindweed is a plant that grows tightly around other plants. The drawing below shows bindweed growing around a rose bush. (a) Complete the sentences below. Choose from the words in the list. (i) air light support water minerals Bindweed grows as high as possible on the rose bush so that the bindweed can get as much... as possible. Bindweed grows around the rose bush because the rose bush provides... for the bindweed. (b) A gardener cut through the stem of the bindweed at X. Two days later the bindweed above X was dead. Why did the bindweed die? Tick the correct box. no air no light no warmth no water (c) The gardener adds fertiliser to the soil to help her rose bushes to grow well. What do plants get from the fertiliser? Tick the correct box. acids minerals sugars vitamins Page 2 of 36

3 (d) Plant roots have root hairs. Which diagram shows a root hair? Tick the correct box. not to scale maximum 5 marks Q2. The diagram shows a plant cell. Some parts of the cell are named. (a) Which two named parts are present in plant cells but not animal cells? marks Page 3 of 36

4 (b) Which named part contains the genetic information?... (c) Which named part absorbs light energy for photosynthesis?... (d) Name the part labelled X on the drawing.... (e) Where in a plant would you find a cell like the one in the diagram? Tick the correct box. in the centre of a root in the lower surface of a leaf near the upper surface of a leaf near the surface of a root Maximum 6 marks Q3. The diagram shows a plant cell. (a) (i) The cell is from a leaf. Give the name of the part which is present in this leaf cell but not present in root cells. Give two parts, labelled on the diagram, which are not present in animal cells marks Page 4 of 36

5 (b) The five parts of the cell labelled on the diagram have different functions. In the table below, write the name of the correct part of the cell next to its function. One has been done for you. 4 marks Maximum 7 marks Q4. The diagram below shows a cell from the inside of a human cheek. (a) On the diagram, label parts A, B and C. 3 marks (b) Plant cells have some parts which animal cells do not have. Name two of these parts marks Maximum 5 marks Page 5 of 36

6 Q5. Sam made a model cat. He mixed modelling powder with water. He poured all of the mixture into a mould. He covered the mould with plastic film so that water could not evaporate. (a) (i) After 10 minutes, Sam removed the model cat from the mould. Sam had mixed 40 g of modelling powder with 12 g of water. What was the mass of the model cat?... g Complete the sentence below using words from the list. gas liquid solid vapour After 10 minutes, the mixture in the mould changed from a... into a... 2 marks Page 6 of 36

7 (b) Sam attached a small magnet to the model cat. The magnet was attracted to the fridge door. What metal are magnets made from?... (c) Sam made another model, B. He attached a small magnet to model B. (i) Sam placed model A next to model B. The magnets attracted each other. Label the poles on the magnet on model B Use the letters N and S. Sam then turned the magnet on model A around. What would happen to model B?... 2 marks maximum 5 marks Page 7 of 36

8 Q6. The list below shows properties that different elements can have. magnetic can be compressed very high melting point very low melting point good conductor of heat poor conductor of heat good conductor of electricity poor conductor of electricity (a) Which two properties from the list above make aluminium suitable for saucepans? marks (b) Which property in the list above explains why: (i) copper is used in the cable of a television? a lot of oxygen gas can be pumped into a very small container? Maximum 4 marks Q7. The thermometer drawn below can be used to measure the temperature of the human body. (a) (i) What is the lowest temperature this thermometer can measure?... C Page 8 of 36

9 What is the normal temperature of the human body? Tick the correct box. 37 C 39 C 41 C (iii) When we are ill our temperature may go up. A nurse can measure a child s temperature with two different thermometers as shown below. Give one reason why it is safer to use a plastic strip thermometer than a glass thermometer. (b) Viruses are micro-organisms that can make us ill. Give the name of one other type of micro-organism that can make us ill.... (c) Alcohol and mercury are two liquids that can be used in glass thermometers. The table gives information about these liquids. liquid boiling point (ºC) colour alcohol 78 colourless mercury 357 shiny grey (i) A red dye is added to the colourless alcohol used in thermometers. Suggest a reason for this. Page 9 of 36

10 Choose words from the list below to fill the gaps in the sentences. gas liquid solid When alcohol and mercury boil they both change from a liquid to a... A thermometer containing mercury can be used to measure the temperature of an oven at 150 C because mercury is a... at 150 C. maximum 7 marks Q8. Sarah wanted to find out how the length of a copper rod changes when it is heated. She fixed one end of the rod and allowed the other end to roll on a pin which had been put on a glass plate. A drinking straw, attached to the pin, showed the movement of the end of the rod. (a) (i) What happens to the motion of the copper atoms in the rod as it is heated? What happens to the average distance between the atoms of copper when the rod is heated? Page 10 of 36

11 (b) The graph shows the length of a copper rod at different temperatures. The rod was mm long at room temperature. (i) At what temperature has the rod increased its length by 1.0 mm? C The rod was mm long at room temperature. What will its length become if it is placed in melting ice at 0 C? mm Maximum 4 marks Page 11 of 36

12 Q9. Diagram A represents a gas in a container. The gas can be compressed by moving the piston to the right. (a) (i) How can you tell that the substance in the container is a gas?.... How can you tell from the diagram that the gas is pure?.... (b) The piston is moved to the right as shown in diagram B. How can you tell, from diagram B, that the pressure of the gas has increased? Page 12 of 36

13 (c) Diagram C shows what happened to the molecules after the gas was compressed more. (i) How can you tell that a chemical reaction happened when the gas was compressed?.... The mass of the gas in both diagrams B and C was 0.3 g. Why did the mass of the gas not change when it was compressed?.... (iii) Complete the table below with the correct chemical formula of each substance. Use the key to help you. (iv) What is the name of the substance represented by the symbol?... maximum 7 marks Page 13 of 36

14 Q10. (a) The drawing below shows the parts of a torch. (i) Paul closed the switch. Why did this turn on the torch? The diagrams below show symbols for a battery, a bulb and a switch. Connect the symbols to make a series circuit for the torch. Page 14 of 36

15 (b) The drawings below show two other torches. In both torches, the bulbs will not light even when Paul closes the switches. Look carefully at the drawings. (i) Why is the circuit of torch A not complete? What could you do to torch B to get the bulb to light? Page 15 of 36

16 (c) When Paul bought his torch there was a paper strip between the contacts of the switch as shown below. Paul had to remove the paper strip before he could turn the torch on. Give the reason for this maximum 5 marks Q11. Alice connects four light bulbs for her model house, as shown. She puts the bulbs into the holes in the back wall. (a) When Alice turns the switch on, the bulbs do not light up. The batteries are not flat. None of the bulbs is broken. Why do the bulbs not light up?... Page 16 of 36

17 (b) Alice makes the circuit work. When she turns the switch on, the bulbs are not very bright. What must Alice add to the circuit to make the bulbs brighter?... (c) The four bulbs in the circuit are the same. Which statement is correct? Tick the correct box. Each bulb is the same brightness. The bulbs at the top are brighter. Each bulb is a different brightness. The bulbs at the bottom are brighter. The diagrams show two ways to write the model house. circuit 1 circuit 2 (d) (i) In circuit 1, bulb B breaks and goes out. What happens to the other bulbs in this circuit? In circuit 2, bulb C breaks and goes out. What happens to the other bulbs in this circuit? Page 17 of 36

18 (e) In circuit 2, Alice adds another switch so that she can turn bulb A off while the other bulbs stay on. Write the letter S on circuit 2 to show where Alice should add the switch. Maximum 6 marks Q12. The back window of this car contains a heating element. The heating element is part of an electrical circuit connected to the battery of the car. The diagrams below show two ways of connecting the circuit of a heating element. (a) Give the name of each type of circuit: circuit A... circuit B... Page 18 of 36

19 (b) A wire gets broken at point X on circuit A and at point Y on circuit B. When the switch is closed, how does the broken wire affect the heating element in: (i) circuit A? circuit B?... (c) In very cold weather, ice may form on the back window of the car. When the heating element is switched on, the ice will disappear and the surface of the window will become clear and dry. (i) Fill the gap below to show the energy transfer that takes place. When the heater is switched on,... energy is transferred from the wires to the ice. As the window becomes clear and dry, physical changes take place in the ice. Fill the gaps below to show the physical changes which take place. from... to... to... Maximum 5 marks Page 19 of 36

20 Q13. The diagram shows two dodgem cars at a fairground. The circuit symbols for the motor and pedal for each dodgem car are shown on the diagram. (a) Complete the following sentence. Each dodgem car is connected to the power supply through the... which is in contact with the wire mesh, and through the... which is in contact with the metal floor. (b) Dodgem cars are connected using parallel circuits. Complete the circuit diagram below for the two dodgem cars. Use two motor symbols,, and two switch symbols,. The power supply for the circuit has been drawn for you. 2 marks Page 20 of 36

21 (c) Even when the power supply is switched on, the dodgem car will not move until the pedal is pressed. Give the reason for this (d) A man looks after the dodgem cars during the rides. Why does the man not get an electric shock as he walks across the metal floor? (e) During one ride, the two dodgem cars are running. The pick-up wire on one car snaps off. Describe how this affects: (i) the dodgem car with the broken pick-up wire; the other dodgem car. Maximum 7 marks Page 21 of 36

22 Q14. Some pupils made an electric cell using two different metals and a lemon. They put strips of copper and zinc into a lemon and connected them to the terminals of an electric clock. (a) Look at the photograph. What evidence is there that they have made an electric cell?... (b) The pupils had pieces of copper, zinc, iron and magnesium and some lemons. They wanted to find out which pair of metals made the cell with the biggest voltage. What equipment should they use to measure the voltage of their cells?... (c) In their investigation they used different pairs of metals. Give one factor that they should keep the same.... Page 22 of 36

23 (d) The pupils measured the voltage produced by different pairs of metals. Their results are recorded below. Which pair of metals made the cell with the biggest voltage?... and... (e) Look at the results in the table above. Why should the pupils not use pairs of the same type of metal for the clock? maximum 5 marks Page 23 of 36

24 M1. (a) (i) Light accept sunlight do not accept Sun 1 (L3) support 1 (L4) (b) no water if more than one box is ticked, award no mark 1 (L4) (c) minerals if more than one box is ticked, award no mark 1 (L3) (d) C if more than one box is ticked, award no mark 1 (L4) [5] M2. (a) cell wall answers may be in either order chloroplast accept vacuole do not accept X (b) nucleus do not accept chromosomes (c) chloroplast do not accept chlorophyll (d) vacuole accept sap accept the correct label written within the vacuole on the diagram or next to label X (e) near the upper surface of a leaf if more than one box is ticked, award no mark [6] Page 24 of 36

25 M3. (a) (i) chloroplast chloroplast answers may be in either order cell wall accept wall do not accept vacuole (b) part of the cell chloroplast nucleus cell wall accept wall cell membrane accept membrane [7] M4. (a) A: membrane B: nucleus C: cytoplasm (b) any two from cell wall chloroplasts accept chlorophyll large vacuole accept vacuole accept starch grain 2 (L6) [5] Page 25 of 36

26 M5. (a) (i) 52 accept liquid into a solid both states are required for the mark 1 (L3) 1 (L3) (b) any one from iron steel accept cobalt or nickel 1 (L4) (c) (i) N S both poles are required for the mark it would be repelled accept pushed away accept it would fall down or drop they would not attract is insufficient 1 (L3) 1 (L4) [5] M6. (a) very high melting point answers may be in either order good conductor of heat do not accept good conductor 1 (L3) 1 (L3) (b) (i) good conductor of electricity do not accept good conductor 1 (L3) can be compressed 1 (L4) [4] M7. (a) (i) C 1 (L3) 1 (L4) Page 26 of 36

27 (iii) any one from less chance of micro-organisms being passed on or spread glass could break accept less chance of germs being passed on accept might pass on disease accept a child might bite or swallow the thermometer if more than one box is ticked, award no mark mercury or alcohol or liquid could spill (if the glass thermometer broke) mercury is poisonous you could choke 1 (L3) (b) any one from bacteria fungi protozoa accept a named non-viral pathogenic micro-organism such as salmonella do not accept names of diseases do not accept germs 1 (L4) (c) (i) any one from so that alcohol can be seen accept so you can see it alcohol is difficult to see you cannot easily see a colourless liquid accept you cannot see a colourless liquid to make it easier to read the thermometer accept so you can read it 1 (L4) gas liquid answers must be in the correct order 1 (L3) 1 (L4) [7] Page 27 of 36

28 M8. (a) (i) any one from they vibrate further accept they vibrate more or faster they move faster accept they go faster do not accept they move about more or they collide more it increases accept it gets bigger or they move further apart (b) (i) (L5) 1 (L5) [4] M9. (a) (i) (molecules) are far apart or not touching each other accept only gases can be compressed the gas can be compressed is insufficient as it is given in the question accept they are randomly arranged there is only one type of molecule or compound or substance accept there is one type of particle do not accept there is only one type of atom or element 1 (L7) 1 (L7) (b) any one from the space or distance between the molecules or particles is smaller accept the volume is less accept atoms for particles the particles or they are closer together more particles are touching the sides accept particles hit the sides more often the particles are hitting the sides is insufficient if the gas is compressed the pressure rises is insufficient 1 (L7) Page 28 of 36

29 (c) (i) any one from new or different compounds have formed accept they are now joined in threes accept new combinations of particles or atoms there is more than one compound accept the compounds are different accept there is no longer a pure substance 1 (L7) any one from the same number of atoms are present accept mass is conserved the mass stays the same is insufficient nothing has been added to or lost the same atoms are present is insufficient nothing changed is insufficient the amount of gas stays the same is insufficient 1 (L7) (iii) NO accept ON N 2 O accept ON 2 NO 2 accept O 2 N all three answers are required for the mark 1 (L7) (iv) nitrogen oxide accept nitrogen monoxide accept nitric oxide 1 (L7) [7] M10. (a) (i) any one from it let the current or electricity flow current could flow through the bulb it completed the circuit accept the contacts came together 1 (L3) Page 29 of 36

30 all three components must be correctly connected in series accept a mark may be awarded for any correctly connected circuit drawn with straight or curved wires award a mark for a correct circuit diagram in which the pupil has drawn the symbols instead of connecting the printed symbols 1 (L3) (b) (i) any one from the bulb is broken or blown the filament is broken accept the coil is broken the bulb is not connected properly is insufficient turn one of the cells around accept turn a battery round accept turn the battery accept put the batteries in the right way turn the batteries round is insufficient the mark may be awarded for a description of the fault eg both batteries are the same way up 1 (L3) 1 (L3) Page 30 of 36

31 (c) any one from it stopped current from flowing accept to stop the batteries running down paper does not conduct or is an insulator the circuit was broken or incomplete accept to stop the contacts coming together so that the circuit can be completed 1 (L3) [5] M11. (a) any one from the circuit is not complete accept there is no circuit a wire is missing two of the bulbs are not connected accept the bulbs are not connected do not accept the switch might be broken or there is a loose connection 1 (L3) (b) another cell or battery accept put the bulbs in parallel or make a parallel circuit or use new batteries do not accept use stronger batteries 1 (L5) (c) Each bulb is the same brightness. if more than one box is ticked, award no mark 1 (L4) (d) (i) they go out accept they stop working do not accept they get dimmer 1 (L3) any one from they stay on or stay the same accept they get brighter they do not go out accept only the broken bulb goes out nothing 1 (L4) Page 31 of 36

32 (e) a letter S drawn onto or close to the wire in the top part of the circuit anywhere between the two junctions accept an open switch symbol drawn onto the diagram do not accept a letter S drawn mid-way between the top two wires or at a junction between the top two wires as shown below 1 (L4) [6] M12. (a) circuit A: series circuit B: parallel both answers are required for the mark 1 (L5) (b) (i) the circuit or heating element will stop working accept it will not work or it will be off accept the whole circuit has no current through it accept it becomes cooler do not accept it breaks the heater or element or it 1 (L5) any one from the circuit or element will continue to work one wire will not heat the window accept the bottom one has no current through it nothing or it will not be affected are insufficient accept it will work less well accept the bottom wire becomes cooler do not accept it becomes cooler do not accept it does not work properly 1 (L5) Page 32 of 36

33 (c) (i) thermal accept heat 1 (L5) from solid to liquid to gas all three states are required for the mark accept from solid to liquid to vapour or steam accept from ice to water to vapour or gas 1 (L5) [5] M13. (a) pick-up wire metal wheel answers must be in the correct order both answers are required for the mark 1 (L5) (b) One mark is for drawing the two motors connected in parallel. One mark is for drawing one switch in series with each motor. Both marks should only be awarded if the circuit is correct. the switches may be drawn either side of the motors 2 (L5) (c) any one from it completes the circuit it acts as a switch accept because the circuit is not complete the pedal connects the motor is insufficient accept the pedal connects the motor to the power supply 1 (L5) (d) any one from he does not complete a circuit accept the circuit is not complete he does not connect the floor and wire mesh ceiling accept he is not touching the ceiling accept he wears trainers or he has rubber shoes 1 (L5) Page 33 of 36

34 (e) (i) it stops it is not affected or it keeps going accept it goes slightly faster [7] M14. (a) any one from the clock works accept when the light goes on it is making electricity is insufficient the time on the clock accept it shows (L5) (b) voltmeter multimeter is insufficient (c) any one from the fruit or lemon do not accept the acid condition of metal accept the size or surface area of the metal accept the distance between them accept the amount of metal temperature accept how far they push them in (d) copper and magnesium accept most reactive with least reactive 1 (L5) Page 34 of 36

35 (e) any one from no difference in reactivity accept there would be no reaction between them they produce zero voltage accept it would not work accept there would be no difference [5] Page 35 of 36

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