Question

Why does temperature decrease with higher altitude?

A. Air is held strongly together by gravity, so there is less heat transfer.

B. Air density is lower, so there is less heat transfer.

C. Air density is higher, so there is less heat transfer.

D. Air pressure is higher, so there is less heat transfer.

Answer 1

It's B.

As you go up, the air thins out, meaning it is less dense. Since there are less molecules that can transfer heat, the temperature is lower.