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: Compared to a solution of lye with water, which is strongly basic, would vinegar, which is acidic, have a pH value 
 Answer: closer to 0
The more acidic a solution is, the closer its pH value will be to 0

Question: Simon was digging in his yard and found that the rocks that were deeper in the ground, compared to the surface rocks, were likely 
 Answer: older
Therefore, deeper rock layers must be older than layers closer to the surface.

Question: If Milo starts rubbing two surfaces together quickly and then decrease the speed, what happens to the amount of energy produced? 
 Answer: decreases

Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.