Keystone Biology Quiz The Chemical Basis for Life - (BIO.A ) Water Properties Basic Biological Principles -

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1 Keystone Biology Quiz The Chemical Basis for Life - (BIO.A ) Water Properties Basic Biological Principles - Student Name: Teacher Name: Rachel Michos Date: Score: 1 ) Volume and Density versus Water Temperature Temperature (Celsius) Volume of gram of water (cc or ml) Density ( g/cc or g/ml) 0 (ice) Water changes density with changing temperature. At what temperature in Celsius does water have its smallest density value? A) 0 C) 20 B) 4 D) /8

2 2 ) The long distance water movement, from roots up to leaves, of the water transport in large plants depends on one unique property of water. Water's unique property of allows water molecules to stick together so they can be pulled upward by the force of transpiration. A) adhesion C) indention B) cohesion D) retention 3 ) Water's unique properties result from the fact that water A) has such a small molecular mass. C) is a small ionic compound. B) is a polar covalent molecule. D) has a neutral ph. 2/8

3 4 ) Water's makes it an excellent solvent for salts, like sodium chloride, as well as other substances required by cells to carry out metabolic processes. A) ph C) specific heat B) polarity D) molecular weight 5 ) The volume of water in a graduated cylinder should be read the meniscus. A) below C) at any point on B) at the edge of D) at the bottom of the curve of 6 ) Volume and Density versus Water Temperature Temperature (Celsius) Volume of gram of water (cc or ml) Density ( g/cc or g/ml) 0 (ice) Water changes volume with changing temperature. Water's volume increases very rapidly between 0 degrees Celsius and 4 degrees Celsius as the water freezes and becomes ice. The percent of volume increase between these states of matter at 0 degrees and 4 degrees is A) 1% C) 9% B) 4% D) 10% 3/8

4 7 ) Water molecules are due to bonding. This property allows for the movement of water from plant roots up to plant leaves. A) cohesive; ionic C) adhesive; hydrogen B) cohesive; hydrogen D) adhesive; covalent 8 ) Water can absorb more heat than land, but water does not increase in temperature as fast because it has a high A) polarity. C) heat capacity. B) surface area. D) surface tension. 9 ) Because water is a polar molecule, it makes an excellent solvent for atoms and compounds found within cells and tissues. Water, acting as a solvent in organisms, aids in all of the following EXCEPT A) eliminating wastes. C) constructing cell membranes. B) maintaining turgor pressure. D) supplying oxygen and nutrients to cells. 1 0 ) Which statement BEST explains why the specific heat of water is higher than the specific heat of most other substances? A) B) Due to its polarity water can absorb heat without a significant temperature change. Due to the hydrogen bonding in liquid water, it takes more heat energy to reach boiling. C) D) Because water is a covalent compound, it takes a lot of energy to change its kinetic energy. Water has a higher density value than most substances and requires more energy to change the temperature. 4/8

5 1 1 ) The students in Ms. Hill's science class were investigating the properties of water. Juan dipped a finger in a beaker of water; Sally dipped her finger in a beaker of alcohol. They both streaked the lab bench with the liquids on their fingers and watched to see which liquid disappeared or evaporated first. The alcohol evaporated quickly, leaving the water streak on the lab bench for several minutes. What unique property of water was illustrated by this simple experiment? A) buoyancy C) surface tension B) specific heat D) capillary action 1 2 ) Benzene is a non-polar molecule, meaning that it does not have a positive or negative side. Which statement BEST describes how benzene will dissolve in water? A) B) Benzene can only exist as a gas and gases will not dissolve in water. Benzene dissolves well in water since polar molecules dissolve well in polar solvents. C) D) Benzene will dissolve in water because water is a universal solvent; it will dissolve anything. Benzene will not dissolve well in water since non-polar molecules do not dissolve in polar solvents. 1 3 ) Water is called the universal solvent because A) It is a nonpolar substance. C) It is used around the world. B) Its molecule has no charge. D) It dissolves a variety of substances. 1 4 ) The attraction between hydrogen and oxygen atoms in different water molecules is known as a(n) A) ionic bond. C) covalent bond. B) hydrogen bond. D) dispersion force. 1 5 ) All BUT one descriptive phrase applies to the illustration of water. That is A) water is a polar molecule. C) the shape of a water molecule is bent. B) the empirical formula of water is HO. D) the molecular formula of water is H 2 O. 1 6 ) To be an effective solvent in living systems, a substance must be able to meet all BUT ONE of the following requirements, namely A) remains liquid over a wide temperature range. C) able to dissolve a great variety of chemical compounds. B) does not readily combine with lipid molecules. D) provide a safety against extremes in temperature by having a high heat capacity. 5/8

6 1 7 ) Knowing that density = mass volume; what would you predict would happen to the density of H 2 O as the temperature is changed from 50 C to 0 C? A) B) The density will increase as the volume of the water expands. The density will decrease as the volume of the water expands. C) D) The density will decrease as the volume of the water decreases. The density will increase as the volume of the water decreases. 1 8 ) Water is a very important factor for us individually, but its importance stretches further than that. For instance, because water absorbs very well, the oceans help stabilize temperatures around the world. A) heat C) salt B) light D) waste 1 9 ) The fact that water is a molecule is important, because this allows it to dissolve many substances. A) binary C) light B) covalent D) polar 2 0 ) Which of these is the freezing point of water? A) 0 C C) 100 K B) 0 F D) 100 C 2 1 ) The main effect that water has on climate is that extreme temperatures occur in cities near large bodies of water, because water heats up and cools down very slowly. A) never C) are more likely to B) most often D) are less likely to 6/8

7 2 2 ) Based on this view of Earth, we would predict that A) land masses are heat sinks on Earth. C) B) more solar radiation is absorbed by the oceans than by land masses. D) less solar radiation is absorbed by water than that absorbed by land. more solar radiation is absorbed by Earth's land masses than the oceans. 2 3 ) Clouds act in much the same way as high humidity in Earth's atmosphere. The presence of clouds means moist, humid, atmospheric conditions. This promotes heat retention, and nighttime temperatures, than on a clear, dry night. A) less; lower C) less; higher B) more; lower D) more; higher 7/8

8 2 4 ) The Earth's oceans act as a climate moderator. Oceans do this in many ways, including ALL BUT one method listed here. That is A) evenly distributing solar radiation. C) absorbing huge amounts of carbon dioxide. B) absorbing and releasing solar energy. D) providing moisture to Earth's atmosphere. 2 5 ) If this pattern is annual, we would expect area D. to have the greatest extremes in average annual temperatures because A) of its closeness to Mexico. C) there is the least atmospheric water present. B) it is the southernmost location. D) the location is in the middle of the United States. 8/8