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: Will analyzes the photon energy in an electromagnetic wave with a high frequency. Bill analyzes the photon energy in an electromagnetic wave with a low frequency. _____'s wave has less photon energy.
Answer: Bill

A: In electromagnetic waves with higher frequencies, photons have more energy.
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Q: Question: Marie is rolling cards down a hill. She wants to know which cart will get to the bottom of the hill slower, an empty cart, or a full cart? The cart that will finish first will have a mass that is
Answer: lower

A: An object has greater momentum if it has greater mass, greater velocity, or both.
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Q: Question: Carter travels to the mountain and looks through a telescope. There is very little interference from the atmosphere, so Carter knows that above the telescope, there is _____ air compared to sea level.
Answer: less

A:
Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.
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