According to the National Center for Atmospheric Research, wind exists because of the movement of air and the differences in air pressure within the atmosphere. When high-pressure air moves toward low-pressure air, the d... More »

Wind is caused by a difference in air pressure. Air pressure changes develop due to heat absorption and are at their largest during the day. Wind speeds are determined by the rate of change in pressure between atmospheri... More »

Global winds are a system of wind patterns distributing warm air unevenly across Earth. If Earth did not rotate, winds would move from the equator to their respective poles. Because Earth rotates, winds appear to be movi... More »

Air cools when it rises through the atmosphere because as altitude increases, air pressure decreases and allows the individual air molecules to expand away from each other. This expansion leads to a decrease in collision... More »

The movement of air is called wind. Wind is caused when cool air moves in and tries to overtake warmer air. More »

According to Climate Education for K-12 from North Carolina State University, air pressure decreases as elevation increases in higher levels of the atmosphere. The atmosphere has four levels. From the closest level to th... More »

Air seems thinner at high altitudes because air pressure is lower, which allows individual air molecules to occupy a larger volume than air molecules do at low altitudes. This decreasing pressure with increasing altitude... More »