Final answer:
Winds, differential heating, and differences in elevation cause the most difference in air pressure.
Step-by-step explanation:
Winds cause the most difference in air pressure. Air pressure is the force exerted by the weight of air molecules in the atmosphere. When wind blows, it creates areas of high and low pressure. The movement of air from high pressure to low pressure creates wind.
However, it is important to note that the differential heating of the Earth's surface is the primary driver of wind and therefore, air pressure differences. The unequal heating of the Earth's surface by the Sun creates temperature variations, which in turn create pressure differences, leading to the formation of wind.
Differences in elevation also contribute to air pressure variations. As you go higher in elevation, the air molecules become less dense because there is less atmospheric pressure pushing down from above. This results in lower air pressure at higher altitudes.
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