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INTRO

Objective 02/4/2013. Identify the layers of the atmosphere. INTRO. What causes your ears to pop as you drive up a mountain? What does altitude have to do with air-pressure?. Layers of the Atmosphere. Layers of the Atmosphere. Atmosphere.

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INTRO

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  1. Objective 02/4/2013 Identify the layers of the atmosphere. INTRO What causes your ears to pop as you drive up a mountain? What does altitude have to do with air-pressure?

  2. Layers of the Atmosphere

  3. Layers of the Atmosphere • Atmosphere • The mixture of gases that surrounds our planet, allowing plants and animals to live here.

  4. Does Air Have Mass? • What makes up our Atmosphere? • A mixture of gases • Nitrogen – 78% • Oxygen – 21% • And other stuff: • Carbon dioxide • Salt • Dust • Ice • Water vapor

  5. Does Air Have Mass? • Air pressure • The measure of the force with which air molecules push on a surface. • Pressure Demo

  6. Does Air Have Mass? • What is Air Pressure? • At sea-level, air weighs about 30 pounds per square inch! • However, scientists measure air pressure in millibars (mb)

  7. Layers of the Atmosphere • What separates the layers? • Areas of different temperature

  8. Layers of the Atmosphere

  9. Layers of the Atmosphere • Troposphere • 0 – 12km • Lowest layer • All weather and clouds occur here

  10. Layers of the Atmosphere • Stratosphere • 12 – 50km • Contains the Ozone Layer, which absorbs harmful UV rays from the sun • Planes fly here

  11. Layers of the Atmosphere • Mesosphere • 50 – 80km • Coldest layer • Meteors burn up here, producing “meteor tails”

  12. Layers of the Atmosphere • Thermosphere • 80 – 550km • No definite outer limit • Hottest layer, but thinnest

  13. Layers of the Atmosphere • Thermosphere continued • Divided into two layers • Ionosphere • Reflects radio waves back to earth • Aurora Borealis occurs here • Exosphere • Satellites and the International Space Station orbit in this layer!

  14. Layers of the Atmosphere • Summary: • What are the four layers of the atmosphere? • Which layer of the atmosphere makes it possible to listen to the radio? • Which layer do you live in?

  15. Objective 02/4/2013 Identify the layers of the atmosphere. Outro Why does the temperature of different layers of the atmosphere vary?

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