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The coldest layer of the atmosphere is in the Mesosphere. This is because temperatures are decreasing as the Mesosphere extends upward above the Stratosphere. The air is thinner because the air particles are further apart. The next layer, known as the Thermosphere is the hottest layer. The reason why this layer is so hot, is because it contains fewer air molecules then the other layers, making the air very thin and easy to warm. The Thermosphere is closest to the sun and most sensitive to solar energy which is why it gets hot very quickly.

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After the troposphere, which layer of the atmosphere has the next coldest layer?

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After the troposphere, the next layer of the atmosphere with the highest temperatures is the stratosphere. In the stratosphere, temperatures increase with altitude due to the absorption of ultraviolet radiation by the ozone layer. This heating effect causes the stratosphere to be warmer at higher altitudes compared to the lower part of the layer.


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What layer of the atmosphere means middle layer?

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How does the atmosphere affect's earth?

That's a very general question. In the broadest sense, Earth's atmosphere allows life to exist on the Earth. It's a mixture of approximately 78% Nitrogen, 21% Oxygen, and the remaining 1% of other gases (primarily argon). Oxygen, of course, is essential for animal life, and the carbon dioxide in the atmosphere allows for plant life. The atmosphere consists of 5 layers. The outermost layer, the Exosphere, is essentially space with some floating air molecules. The next innermost layer is the Thermosphere, and is, surprisingly, quite prone to extreme temperatures (temperatures are often much higher during daylight and colder during nighttime than Earth's surface at the same time). The next innermost layer is the Mesosphere, where the coldest temperatures on Earth may be found. Going inwards again, the next layer is the Stratosphere, which is particularly important because it contains the ozone layer, a layer of molecules (O3) which absorb harmful UV rays. Without the ozone layer, life could not exist in its present form. And finally we arrive at the Troposphere, which lies directly upon the Earth's surface. The air we breath is trapped in this layer, and much of our weather exists in this layer.


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