Question

1. what happens to air pressure as altitude increases (as you go from the surface towards outer space)?

Explanation:

As altitude increases, the number of air molecules above a given point decreases. Air pressure is caused by the weight of these air molecules. With fewer molecules above, there is less weight and thus less pressure. This is based on the relationship between the density of air (which decreases with altitude) and the force exerted (air pressure).

Answer:

Air pressure decreases as altitude increases.