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Atmosphere

Atmosphere. What is the Atmosphere. Thin layer of air that regulates global temperature, and filters out dangerous solar radiation. Looks like a thin halo of blue light around the earth. Composition of the Atmosphere. 78% is nitrogen (N 2 ) 21% is oxygen (O 2 ) 1% are trace gasses.

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Atmosphere

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  1. Atmosphere

  2. What is the Atmosphere • Thin layer of air that regulates global temperature, and filters out dangerous solar radiation. • Looks like a thin halo of blue light around the earth.

  3. Composition of the Atmosphere • 78% is nitrogen (N2) • 21% is oxygen (O2) • 1% are trace gasses

  4. The Layers from Space to Earth • Thermosphere • Ionosphere • Mesosphere • Stratosphere • Troposphere

  5. TIM ST. • An easy way to remember the layers is to use the mnemonic device TIM St. • T hermo sphere • I ono sphere • M eso sphere • S trato sphere • T ropo sphere

  6. Troposphere • Almost all weather occurs in this layer • Most clouds, wind, rain, snow are in this layer • As you go higher in the Troposphere it gets cooler.

  7. Temperature Inversions • Hot air is usually closer to the earth because the sun heats the surface of the earth. • Temperature inversions- when cool air gets trapped beneath hot air. • This happens in Los Angeles and causes smog = smoke (from cars) + fog (moisture in air)

  8. Stratosphere • The layer of the atmosphere that extends upward from the troposphere to an altitude of 50 km. • Contains the ozone layer O3

  9. (Found in the Stratosphere) Ozone • Ozone comes from the greek ozein “to smell” • Ionizers make ozone from oxygen O2 Oxygen O3 Ozone

  10. Naturally the Sun’s Rays make ozone from oxygen O2 Oxygen O3 Ozone

  11. Depletion of the Ozone Layer • Occurring over Antarctica

  12. Ozone Depletion • Caused by some chemicals such as CFC’s

  13. Who cares if the ozone is thinning? • Ozone provides protection from solar radiation which can cause skin cancers.

  14. Mesosphere • The mesosphere is 50-80 km • This is the coldest layer of the atmosphere -80°C • Noctilucent or "night-shining" clouds (NLCs). Occur in the mesosphere

  15. Ionosphere • The area of the earths atmosphere where electrically charged IONS are found • Used in radio communications • Closer to earth during the day • Farther from the earth at night

  16. Auroras occur in the Ionosphere

  17. Excited ions release light in the polar regions of the globe

  18. Thermosphere • The hottest layer of the atmosphere • Thermo = heat • This is where meteorites can burn up upon entry into the atmosphere.

  19. The Greenhouse Effect

  20. The causes of the greenhouse effect • The burning of fossil fuels to produce carbon dioxide gas • Any process that releases carbon dioxide into the atmosphere

  21. Atmosphere Poster • Label the Layers of the atmosphere • Elevations of the layers • Temperatures of the layers • 2 interesting facts about the layers • Draw the two interesting facts in the appropriate layers

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