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Earth’s Atmosphere - PowerPoint PPT Presentation


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Earth’s Atmosphere. 78% Nitrogen 21% Oxygen 0.93 Argon Remaining % - Trace gases including CO 2 and water vapor. Composition:. Based on Temperature Pressure decreases with altitude. Layers of the Atmosphere . From the Earth’s surface up to 12 km Temperature decrease Supports all life

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composition

78% Nitrogen

  • 21% Oxygen
  • 0.93 Argon
  • Remaining % - Trace gases including CO2 and water vapor
Composition:
layers of the atmosphere

Based on Temperature

Pressure decreases with altitude

Layers of the Atmosphere
troposphere

From the Earth’s surface up to 12 km

  • Temperature decrease
  • Supports all life
  • Winds increase w/ height
  • Moisture content decreases w/ height
  • All weather occurs here
Troposphere
stratosphere

From 12 km – 50 km

  • Temperature increases
  • Ozone contained here – good ozone
  • Very calm
Stratosphere
mesosphere

From 50 km – 85 km

  • Temperature decreases
  • Top of mesosphere coldest part of the atmosphere
  • Meteors burn up here
Mesosphere
thermosphere

From about 85 km – 500 km

  • Temperatures increase (caused by solar activity)
  • Warmer during the day than at night
  • X-rays and UV radiation absorbed here
  • Aurora’s (Northern and Southern lights created here)
Thermosphere