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: Jimbo was playing on his sled one day. He slid down a snowy hill and then slid down a rocky hill. Which hill created less heat energy?
Answer: snowy hill
Friction causes the molecules on rubbing surfaces to move faster, so they have more heat energy.

Question: If Milo is out exploring and he comes across two glaciers, each with their own u-shaped valley, will the smaller or larger glacier have a smaller u-shaped valley?
Answer: smaller glacier
Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.

Question: Noah has noticed that the galaxies are expanding. This will make the galaxies
Answer: further apart.
As the Universe expands, galaxies move further and further apart.