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: When we lower the temperature of water it becomes
Answer: more dense

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: Simon was digging in his yard and found that the rocks that were deeper in the ground, compared to the surface rocks, were likely
Answer: older

A: Therefore, deeper rock layers must be older than layers closer to the surface.
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Q: Question: If Mary is performing an experiment and she increases the frequency of her electromagnetic wave, what happens to the energy it produces?
Answer: increases

A:
The higher the frequency of an electromagnetic wave, the greater its energy.
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