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 Jimbo is surfing and the waves begin to crest higher, what happens to amplitude of those waves? 
 Answer: increases

A: The higher the crests of a wave are, the greater the amplitude.
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Q: Question: Greta yells across the canyon in the cool morning and again in the hot afternoon. The sound likely traveled _____ in the morning. 
 Answer: faster

A: For a given medium, sound has a slower speed at lower temperatures.
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Q: Question: What happens when you make a rocket heavier? 
 Answer: falls down

A:
By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.
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