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Why do they call it the thermosphere?

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The thermosphere (or the upper atmosphere) is the height region above 85 km, while the region between the tropopause and the mesopause is the middle atmosphere (stratosphere and mesosphere) where absorption of solar UV radiation generates the temperature maximum near 45 km altitude and causes the ozone layer. read more

This lesson is about the thermosphere. We will learn what this layer of the atmosphere is, where it is, what it's made of and why it's called the thermosphere. read more

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