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: Question: Mike wants his voice to travel faster, so he will speak in a room that is 
 Answer: warmer

Answer: For a given medium such as air, sound has a slower speed at lower temperatures.


Question: Question: If Earth's plate tectonics slowed down, Earth's convection would 
 Answer: decrease

Answer: Convection on early Earth was faster and so plate tectonics was faster.


Question: Question: When Dan went to the beach, he found rocks that had been eroded. Some rocks were hardly weathered though, so those must have a resistance that is 
 Answer: higher

Answer:
Different types of rocks weather at different rates. More resistant types of rocks will remain longer.