The ____ is the amount of heat in the air. The heat affects how much moisture is in the air, because it causes water to evaporate. ____ is the amount of weight that air is putting on Earth. Cold air has higher pressure, because it is heavier. Warm air is lighter and has less pressure, which causes it to rise. When warm air rises, then cool air moves in to replace it. Changes in air pressure cause air to move, which creates wind. ____ has a large effect on weather, because it causes movement in clouds. There are global wind patterns that continuously blow. Some of these winds come from the equator and blow toward the poles. ____ is the amount of moisture in the air. ____ is rain, snow, or sleet that falls from clouds to the ground.

Weather Elements

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