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: Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has _____ friction than the sandpaper. 
 Answer: more

A: Rougher surfaces have more friction between them than smoother surfaces.
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Q: Question: If Milo has asthma and moves to the city, what can happen to his asthma? 
 Answer: gets worse

A: Certain respiratory conditions can be made worse in people who live closer to or in large cites.
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Q: Question: Will drops a ball from 100 feet at the same time that Tony drops a ball from 50 feet. Whose ball has more potential energy? 
 Answer: Tony's

A:
So the higher an object is above a surface, the more potential energy it has.
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