The lowest layer of Earth's atmosphere, where weather occurs.

The horizontal movement of air from an area of high pressure to an area of lower pressure.

Winds that blow over short distances.

The flow of cooler air from over an ocean or lake toward land.

The flow of air from land to a body of water.

Winds that blow steadily from specific directions over long distances.

Bands of high-speed winds about 10 kilometers above Earth's surface.

The process by which water molecules in liquid water escape into the air as water vapor.

The process by which molecules of water vapor in the air become liquid water.

A huge body of air that has similar temperature, humidity, and air pressure throughout.

A cold air mass that forms north of 50° north latitude or south of 50° south latitude and has high air pressure.