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: If Jim lowers the temperature of water in his bathtub, what happens to the density of the water?
Answer: increases

A: Water becomes more dense when it is colder and when it has more salt.
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Q: Question: John started measuring the current, and notices that as the current got weaker the electromagnet became
Answer: Weaker

A: The more current, the stronger the electromagnet.
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Q: Question: Suppose that Mary smokes cigarettes for 20 years. If you measured the oxygen levels in her blood before she started smoking and compared them to oxygen levels later in her life, what would you find?
Answer: less oxygen in her blood later in life

A:
Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.
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