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.

Input: Consider Input: Question: Rocks that are buried very shallow are _____ than rocks on the surface. 
 Answer: newer

Output: The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.


Input: Consider Input: Question: If Mary is playing music in her room and the heater stops working, causing the temperature to fall, what happens to the speed of the soundwaves her radio is generating? 
 Answer: decreases

Output: For a given medium, sound has a slower speed at lower temperatures.


Input: Consider Input: Question: A piece of glass has _____ friction than a piece of sandpaper. 
 Answer: less


Output: Rougher surfaces have more friction between them than smoother surfaces.