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.

Q: Question: Jim puts his water in the oven for later. The molecules in the liquid 
 Answer: speed up

A: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
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Q: Question: Mona lives on a planet with an unstable population. If the number of people on her planet were to decrease, what would happen to global warming on her planet? 
 Answer: decrease

A: For example, more people on the Earth means more people contributing to global warming and pollution.
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Q: Question: When Mike has low blood pressure, Mike knows that the volume of his blood is 
 Answer: low

A:
This is because the lower blood volume in the vessels exerts less pressure on the vessel walls.
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