Earth Science

• Atmosphere


  The layers of the atmosphere surrounding the Earth
• Layers of the atmosphere

  1. Troposphere

  2. Stratosphere

  3. Mesosphere

  4. Thermosphere

  5. Exosphere
• Troposphere


  • Lowest atmospheric layer
  • Where weather occurs
  • Temperature decreases with increase in altitude
• Stratosphere


  • Second lowest layer
  • Temperature rises with increase in altitude
  • Contains ozone layer
  • Where aeroplanes fly
• Mesosphere


  • Where most meteors burn upon entry
  • Stretches up to 50 miles from Earth's surface
• Thermosphere


  • Air is very thin
  • Temperatures get extremely hot
  • Contains ionosphere
• Exosphere


  • Quite thin air
  • Goes up to 6200 miles from Earth's surface
• Troposphere contains more than 75 percent of the atmosphere's mass
• Ions in the ionosphere help to transmit radio waves