Survey
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Atmosphere A mixture of gases that surrounds a planet or moon. Air Pressure The measure of the force with which air molecules push on a surface. Troposphere • The lowest layer of the atmosphere, in which temperature decreases at a constant rate as altitude increase (layer in which we live.) • equator =11-12 miles • poles under 4 miles • Weather occurs here Stratosphere • The layer of the atmosphere that is above the troposphere and in which temperature increases as altitude increases (home of the Ozone layer) • 12 miles to 31 miles high • Many jet aircraft fly here(very stable) • gases are layered Bad Ozone Tropospheric ozone: Found in the lower atmosphere, near the ground, is formed by cars, power plants, chemical plants and other sources that react in the presence of sunlight. It is a greater concern in areas with higher temperatures and higher pollution. Good Ozone • Stratospheric Ozone: Shields us from the suns UV rays. • 10-30 miles above Earth's surface in the stratosphere. Thermosphere • The uppermost layer of the atmosphere, in which temperature increases as altitude increase (The edge of the atmosphere). • 53 to 375 miles high • Auroras and space shuttle Mesosphere • The layer of the atmosphere between the stratosphere and the thermosphere and in which temperature decreases as altitude increases (middle layer.) • 32 to 53 miles high • Meteors burn up Ionosphere • The layer between the upper mesosphere and the lower thermosphere (home of the Auroras). • layer of electrically charged particles called ions Exosphere • The last layer: beyond this lies space. • 400 to 6200 miles high