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Layers of Atmosphere

Layers of Atmosphere. In what ways is the atmosphere important to survival of life?. Layers. Troposphere . 1 st layer of atmosphere Tropo means changing or turning Where earths weather occurs Varies from 16km to 9km at poles Top of troposphere is about -60 C. Stratosphere.

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Layers of Atmosphere

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  1. Layers of Atmosphere In what ways is the atmosphere important to survival of life?

  2. Layers

  3. Troposphere • 1st layer of atmosphere • Tropo means changing or turning • Where earths weather occurs • Varies from 16km to 9km at poles • Top of troposphere is about -60 C

  4. Stratosphere • Extends from top of troposphere to about 50 km above earth • Strato means spread out or layer • Contains ozone layer • Top hotter than bottom

  5. Mesosphere • 3rd layer • Begins about 50 km above earth extends to 80 km • Outer temps approach -90 C • Meso means middle • Dissolves meteoroids, chunks of metal and stone by friction • Presence of noctilucent clouds • Made of frozen air no water vapor • Usually appear between 50 and 70 latitude

  6. Thermosphere • 4th layer • Only .001% as dense as troposphere air • Starts about 80 km above earth and moves out indefinitely. • Thermo means hot • Approx 1800 C but feels cooler

  7. Ionosphere • Starts about 80 km extends to 400 km • Energy from sun causes particles called ions to become electrically charged • Radio waves bounce off these ions

  8. Exosphere • Exo means outer • Starts at 400 km and extends out thousands of kilometers

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