Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere


21. The layer closest to Earth's surface.
22. It is where the meteors or rock fragments burn up.
23. Many jet aircraft fly in this area because it is very stable.
24. Layer of the atmosphere where ozone is found.
25. Air in this layer is very thin and cold.
26. Weather occurs in this layer because it contains most of the water vapor.
27. Satellites are stationed in this area, 500 km to 1000 km from Earth.
28. The upper limit of our atmosphere.
29. Space shuttles fly in this area and it is also where the auroras are found.
30. It is the layer of air that extends to about 50 km from Earth's surface.

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