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Layers of the Atmosphere. The Earth’s Atmosphere. Definition- A thin layer of air that forms a protective covering around the planet Gases found in the atmosphere Nitrogen – 78% Oxygen – 21% 1% - trace amounts of other gases Solids found in the atmosphere dust salt pollen

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the earth s atmosphere
The Earth’s Atmosphere
  • Definition- A thin layer of air that forms a protective covering around the planet
  • Gases found in the atmosphere
    • Nitrogen – 78%
    • Oxygen – 21%
    • 1% - trace amounts of other gases
  • Solids found in the atmosphere
    • dust
    • salt
    • pollen
  • Liquids found in the atmosphere
    • water
    • up to 4% water vapor
troposphere
Troposphere
  • Closest layer to Earth’s surface - We live here!
  • All weather occurs here
  • 99% of all the water vapor is found here
  • 75% of all atmospheric gases are found here
  • The temperature decreases as you go up in altitude ( drops ~6.5 C foe every km)
  • Gases close to Earth are heated by Earth’s surface & as you move farther away from the surface the air gets cooler
stratosphere
Stratosphere
  • The ozone layer is found here
  • Ozone is made up of 3 oxygen atoms
    • Protects us from the Sun’s ultraviolet rays
  • Planes and jets fly here because it is stable here
  • Weather balloons found here
  • The temperature increases as you go up in altitude because ozone layer absorbs Earth’s radiation
mesosphere
Mesosphere
  • Scientists know least about this layer
  • Meteors burn up in this layer because of friction with the air molecules (called “shooting stars”
  • This is the coldest layer
    • (b/c air molecule thin out with height so they don’t absorb as much radiiation)
  • Temperatures decrease as you go up in altitude
thermosphere
Thermosphere
  • Thickest layer
  • Contains the ionosphere
    • A layer of electrically charged particles
    • Allows radio waves to travel aCuculutcuculclualdjflkadnsfcrossthe country
    • Causes the Northern and Southern lights (auroras)
  • Temperatures increase as you go up in altitude