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: Mike is digging for old rocks. Mike dig downs very, very shallow, and he expects the rocks there to be 
 Answer: younger
[A]: Therefore, deeper rock layers must be older than layers closer to the surface.


[Q]: Question: Carbon dioxide levels increasing cause the temperature to 
 Answer: increase
[A]: An increase in greenhouse gases leads to greater greenhouse effect.


[Q]: Question: Would it be easier to push a block up a 
 Answer: shallow slope
[A]:
The more gradual the slope of the inclined plane, the less input force is needed and the greater the mechanical advantage.