Thursday, September 27, 2012

60-Second Good-To-Knows, September 27th, 2012


This week's topic: Environmental Science

Today's topic is the atmosphere of the earth. There are five separate layers to the earth's atmosphere, with a sixth sub-layer. The closest layer to earth is the troposphere. The troposphere contains weather clouds and almost 75% of our atmosphere's gases. The next layer is the stratosphere. The stratosphere contains the ozone layer and the jet stream. The mesosphere comes next, and it is the coldest part of the atmosphere. After the mesosphere comes the thermosphere, which contains two sub-layers of the atmosphere. The lower layer of the thermosphere is called the ionosphere, and the top layer is the thermosphere. The outermost layer is the exosphere. There is no clear boundary between the exosphere and space, and there are very few air molecules in this layer.

Below is an image showing the differing sizes and locations of layers in the atmosphere.
Image Source: http://www.world-builders.org/

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