Today, there are about how many people living on the earth?
3.4 billion
7.5 billion
9.0 billion
6.6 billion

Which occurs when air is compressed? air molecules move slower. air temperature rises and air molecules move faster. air temperature decreases. air temperature decreases and air molecules move faster.

Witch one is it soo it the the question b.a,b,c,d

On nights when we see the new moon phase, what side of the moon are we seeing?