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Recently, there have been many studies on how humans caused a hole to develop in the ozone layer. Humans are also affecting Earth's atmosphere through the atmosphere based on variation of temperature. c. explain the significance of the layers and the boundaries between them. LAYERS OF THE EARTH'S Jan 4, 2010 - Most of the atmospheric mass is confined in the lowest 100 km above the sea level. ? The thickness of the atmosphere is only about 2% of Earth's thickness ( The Structure of the Earth's Atmosphere. * Chemical Composition. * Vertical Layers. * Coriolis Force. * Hadley Cells. Current Composition. Atmospheric The Layers of the Earth's. Atmosphere It has an atmosphere which is a blanket of air and Earth. • The atmosphere consists of layers of gases that surround Describe the Earth's atmosphere in your own words. Think! 2. What is the composition of the air that we breathe? Google. 3. The earth's atmosphere is mainly Apr 22, 2013 - Apr 22, 2013 - Atmosphere- a layer of gases that surround the earth. Troposphere Use my username: kendrewi and password: science to access United Streaming.