1. Composition of the Earth's Atmosphere
... the stratosphere from the next layer. THE OZONE LAYER The stratosphere contains a thin layer of ozone molecules (with three oxygen atoms) which forms a protective layer shielding life on Earth from the Sun's harmful ultraviolet radiation. Ninety-nine percent of "air" is located in the troposphere and stratosphere. MESOSPHERE Directly above the stratosphere, extending from 85 ... km above the Earth's surface, the mesosphere is a cold layer where the temperature generally decreases with increasing altitude. Here in the mesosphere, the atmosphere is very rarefied nevertheless thick enough t...
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- Grade Level: High School