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Layers of the Atmosphere

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Composition of the Atmosphere The atmosphere is primarily composed of Nitrogen (78%) and Oxygen (21%) Other components are present which include Argon (1% ... – PowerPoint PPT presentation

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Title: Layers of the Atmosphere


1
Characteristics of the Atmosphere
2
Composition of the Atmosphere
  • The atmosphere is primarily composed of
    Nitrogen (78) and Oxygen (21)
  • Other components are present which include
  • Argon (1), "greenhouse" gases (0.01)
  • Ozone (O.01) Carbon Dioxide (0.01-0.1)

3
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4
  • The first layer closest to the earth is the
    troposphere.
  • This layer contains about 90 of the total mass
    of the atmosphere.
  • This is where all plants and animals live and
    breathe.
  • Climate and weather also occur in this layer.

5
  • The next layer is the stratosphere.
  • It extends to about 30 miles above the earth.
  • Ozone in this layer stops many of the sun's
    harmful ultraviolet rays from reaching the earth.

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  • Approximately 90 of the ozone in the
    atmosphere resides in the stratosphere.
  • Ozone absorbs the bulk of harmful ultraviolet
    radiation.
  • Increased penetration of ultraviolet radiation to
    the planet's surface would damage plant life and
    have harmful environmental consequences.
  • Large amounts of solar ultraviolet radiation
    would result in a dramatic increase in cancers.

8
  • The third layer is the mesosphere. The
    temperature can drop to -173 degrees Fahrenheit.
  • This is where we see "falling stars," meteors
    that fall to the earth and burn up in the
    atmosphere.

9
  • The thermosphere layer has many temperature
    changes. Energy from the sun is absorbed and
    bounced back. The top of this layer can get to
    441 degrees Fahrenheit.
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