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Layers of the Atmosphere

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Layers of the Atmosphere What roles do composition, structure and properties play in our atmosphere? The main layers of the atmosphere are classified according ... – PowerPoint PPT presentation

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Title: Layers of the Atmosphere


1
Layers of the Atmosphere
What roles do composition, structure and
properties play in our atmosphere?
2
  • The main layers of the atmosphere are classified
    according to changes in TEMPERATURE!

3
Troposphere 0 12 km
  • Lowest Layer
  • Most variable conditions weather occurs here
  • Shallowest layer contains most mass of the
    atmosphere
  • Temperature decreases to about 60C

4
Stratosphere 12 50 km
  • Temperature increases because of ozone layer
  • Ozone layer absorbs UV radiation from sun and
    converts the energy to heat

5
Mesosphere 50 80 km
  • Temperatures drop (NO ozone)
  • Meteoroids burn up in mesosphere (Shooting Stars)
  • Protects Earths surface

6
Thermosphere 80 km
  • Thin air
  • No definite outer limit gradually ends in outer
    space
  • Temps can reach 1800C
  • Why so hot?
  • Closest to the sun!

7
Thermosphere Layers
  • Ionosphere 80550 km
  • Energy from sun causes molecules to become
    charged particles called ions
  • Auroras occur here.
  • Exosphere 550 km
  • Outer layer of thermosphere
  • Communication satellites (phone, television, etc)

8
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9
Pauses
  • Area between layers where temperature stays
    relatively constant.
  • Layers begin to change at pauses
  • Pauses named for the layer below them

10
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11
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