Earth's Atmosphere

This is a picture of the thermosphere. The thermosphere is the outer layer of the Earth's Atmosphere.  The thermosphere is directly above the mesosphere and below the exosphere. It extends about 90km (56m) to between 500 and 1,000km above our planet.

This is a picture of the mesosphere. The mesosphere is a layer of Earth's Atmosphere. The mesosphere is above the stratosphere layer. The mesosphere starts at 50 km (31 miles) above Earth's surface and goes up to 85 km (53 miles) high.

The Stratosphere is a layer of Earth's Atmosphere. The stratosphere is the second layer, as one moves upward from Earth's surface, of the atmosphere . The stratosphere is above the troposphere and below the mesosphere. The top of the stratosphere occurs at 50 km (31 miles) altitude.

The Troposphere is the lowest layer of Earth's atmosphere. The troposphere starts at Earth's surface and goes up to a height of 7 to 20 km (4 to 12 miles, or 23,000 to 65,000 feet) above sea level. Most of the mass (about 75-80%) of the atmosphere is in the troposphere.

The Exosphere is the layer that is in outer space. It is very high up and the Earth's atmosphere becomes very thin. The region where atoms and molecules escape into space is referred to as the exosphere. The Exosphere is on top of the Thermosphere.

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