Question

1. the figure shown below illustrates the crystal - structure of nacl (salt) and the interaction of nacl with water. water has many properties that are important for the sustainability of life on earth. which property of water is described in the figure below? a. water expands as it freezes. b. water is an excellent solvent. c. water exhibits cohesive behavior. d. water is a liquid at moderate temperatures. 8. the picture below shows an olympic swimmer above the water, but a thin layer of water is still covering his head. what property allows this to occur? a. water expands as it freezes. b. water is a versatile solvent. c. water has a high specific heat. d. water exhibits cohesive behavior. 9. water has the ability to store heat longer than other substances, as well as the ability to evaporate from the skin after sweating. what benefit does this property of water provide to organisms? a. it provides the ability to dissolve nonpolar compounds. b. it provides the appropriate catalyst for chemical reactions. c. it enables organisms to function with a higher cellular ph. d. it allows organisms to maintain a stable internal temperature. 10. in jacksonville beach, the average daytime and nighttime temperatures usually only differ by 7 - 8°c, while temperatures in ocala can differ by as much as 12 - 15°c. what role does water play in keeping temperatures from fluctuating dramatically? a. water is an acid. b. water is a versatile solvent. c. water has a high heat capacity. d. water acts as a buffer.

Explanation:

1. When NaCl dissolves in water, it shows that water is an excellent solvent as it can break the ionic bonds of NaCl and disperse the ions.
2. The thin - layer of water on the swimmer's head is due to water's cohesive behavior, where water molecules stick to each other.
3. Water's ability to store heat and evaporate helps organisms maintain a stable internal temperature as it can absorb and release heat slowly.
4. Water's high heat capacity allows it to absorb or release a large amount of heat without a large change in its own temperature, thus keeping temperatures from fluctuating dramatically.

Answer:

1. B. Water is an excellent solvent.
2. D. Water exhibits cohesive behavior.
3. D. It allows organisms to maintain a stable internal temperature.
4. c. Water has a high heat capacity.