In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: David turns down the temperature in the cabin, so energy of sound waves is moving 
 Answer: slower
[EX A]: At a lower temperature, particles of the medium are moving more slowly, so it takes them longer to transfer the energy of the sound waves.

[EX Q]: Question: If something has a small surface area and is being mixed with something else it will react 
 Answer: slower
[EX A]: Surface Area of Reactants When a solid substance is involved in a chemical reaction, only the matter at the surface of the solid is exposed to other reactants. If a solid has more surface area, more of it is exposed and able to react.

[EX Q]: Question: Sarah's plants have been greatly photosynthesizing regularly, so that means that the plants now produce food in amounts that are 
 Answer: greater
[EX A]:
Less photosynthesis means that plants and phytoplankton produce less food.