Air | Surrounded by air
Surrounded by air
All the air that covers Earth is called the atmosphereLayers of air that surround Earth.. Earth's gravity holds the atmosphere in place around our planet. The atmosphere is a blanket of air over 600 miles (1,000 kilometers) high. Scientists have divided the atmosphere into five layers, according to differences in the temperature of the air. The layer closest to Earth is called the troposphereThe lowest layer of Earth's armosphere, ranging to an altitude of about 9 miles (15 kilometers) above Earth's surface.. The troposphere extends about 9 miles upward (15 kilometers). It contains almost all of what makes up Earth's weather, including clouds, rain, and snow.
Like any gas, air has pressure, mass, and a temperature. Air is composed of 78 percent nitrogen, 21 percent oxygen, 0.9 percent...
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