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 Mona is observing two objects and she realizes that one has a smaller mass then the other, what does that tell her about that object's thermal energy? 
 Answer: it's smaller

A: An object with more mass has greater thermal energy than an object with less mass because it has more atoms.
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Q: Question: When Derek was observing waves, he noted that some had more energy than others. The waves with less energy had particles that were 
 Answer: closer

A: The more energy the wave has, the farther the particles of the medium move.
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Q: Question: If Mona shines a light through both wool and cotton and determines that cotton is more dense then wool, which material will the light move faster through? 
 Answer: wool

A:
The more dense the medium, the slower the light moves.
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