instruction:
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.
question:
Question: Willard dug up a rock from near the surface, and realized it was _____.
Answer: young
answer:
Therefore, deeper rock layers must be older than layers closer to the surface.

question:
Question: If Mona is producing sound waves by listening to her radio at night and she turns down the volume, what happens to the amount of energy being produced by the radio?
Answer: decreases
answer:
A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.

question:
Question: Karen is observing an electromagnetic wave and how it travels from its source. This wave travels near to its source, because the energy is diluted
Answer: less
answer:
However, the energy is diluted as an electromagnetic wave travels farther from its source because it spreads out over an ever-larger area.