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Layers of the Atmosphere

Layers of the Atmosphere. Week 3. Journal Entry 9/11. List the ways you think the Earth’s atmosphere is different from outer space. Journal Entry 9/12. Explain what you think scientifically is happening in each pitcher.

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Layers of the Atmosphere

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  1. Layers of the Atmosphere Week 3

  2. Journal Entry 9/11 • List the ways you think the Earth’s atmosphere is different from outer space.

  3. Journal Entry 9/12 • Explain what you think scientifically is happening in each pitcher. • You may move to get a better look, but observe and then return to your seats. • DO NOT TOUCH THE PITCHERS PLEASE!

  4. Journal Entry 9/14 • If the upper atmosphere is very thin, why do you think space vehicles heat up as they enter the atmosphere?

  5. Atmosphere • Atmosphere: a mixture of gases that surrounds a planet or moon.

  6. Composition of the Atmosphere • The atmosphere is made up of mostly nitrogen gas (78%) • 21% of the atmosphere is oxygen. • The other 1% is made up of argon, carbon dioxide, water vapor, and other gases. • Dust, volcanic ash, sea salt, dirt and smoke are also in the atmosphere.

  7. Atmospheric Layers • Using pages 40-45 fill out the provided chart.

  8. Air Pressure • Using the simulation we are going to determine how air pressure affects the layers of the atmosphere.

  9. Air Pressure • Air Pressure: the measure of the force with which air molecules push on a surface.

  10. Air Pressure in the Layers • Air pressure balances the force of gravity. • As altitude increases, air pressure decreases because there are fewer gas molecules as you move away from the surface of the Earth.

  11. Air Pressure and Weather • Cyclones • An area in the atmosphere that has lower pressure than the surrounding areas. • Air masses converge; winds spiral toward the center

  12. Air Pressure and Weather • Anticyclones • Areas where air moves apart or diverges and sinks. Sinking air is denser than surrounding air. • Rotates in a direction opposite to Earth’s rotation.

  13. Air Pressure and Weather • Cyclones form clouds and rain when the rising air cools. • Cyclones cause stormy weather. • Anticyclones cause dry, clear weather because as the air sinks it gets warmer and absorbs moisture.

  14. Density • Density = mass/volume • The amount of stuff in a given amount of space

  15. Density and the Layers • The densest layer will always sink to the bottom. • What happened in the pitchers? • Which atmospheric layer is the densest?

  16. Density and the Layers • Troposphere is the densest atmospheric layer. • Why?

  17. Model of the Atmosphere • Now we are going to the football field.

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