This atmosphere extends many miles out from the earth's surface. However, this layer is not a uniform layer, from top to bottom. As one moves out from the planet's surface the atmosphere becomes progressively dense. This atmosphere can be divided into four major regions.

The first region is the troposphere which extends about 6.5 miles above the planet's surface. The troposphere contains the oxygen that we breathe and is where a majority of our weather takes place. Beyond the troposphere is the second region of the atmosphere, the stratosphere. The stratosphere extends from roughly 6.5-30 miles from the earth's' surface. The air on this region is much less dense than in the troposphere, and it's a lot drier. The s

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