Essentially, atmospheric pressure is the force exerted at any given
point on the Earth's surface by the weight of the air above that point. In
short: the air that surrounds the Earth creates atmospheric pressure
and this pressure is determined by the collective weight of air
molecules. Air molecules at higher altitudes have fewer molecules
pressing down on them from above and therefore experience lower
pressure, while lower molecules have more force or pressure exerted
on them by molecules piled on top of them and are more tightly packed
together.
HOW DOES THIS RELATE TO MY SEARCH QUESTION WHICH IS
What effect does the amount of air pressure have on how far a soccer ball travels when kicked?