Chapter 16 Section 1 Earth’s Atmosphere - PowerPoint PPT Presentation

donald
slide1 n.
Skip this Video
Loading SlideShow in 5 Seconds..
Chapter 16 Section 1 Earth’s Atmosphere PowerPoint Presentation
Download Presentation
Chapter 16 Section 1 Earth’s Atmosphere

play fullscreen
1 / 9
Download Presentation
Chapter 16 Section 1 Earth’s Atmosphere
134 Views
Download Presentation

Chapter 16 Section 1 Earth’s Atmosphere

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Chapter 16 Section 1 Earth’s Atmosphere

  2. * a thin layer of air that forms a protective covering around the planet 1. Earth’s atmosphere * keeps days cool and nights warm * protects life-forms from some of the Sun’s harmful rays * start = Earth’s surface * end = outer space * made mostly of nitrogen and carbon dioxide

  3. 2. the ozone layer * formed when living organisms released oxygen into the atmosphere * protects Earth from Sun’s harmful rays formed in upper atmosphere * allowed green plants to flourish and release more oxygen 3. What gases make up the atmosphere? • nitrogen 78% • oxygen 21% • water vapor - up to 4% • argon 0.93% • carbon dioxide 0.03%

  4. 4. human effect on the atmosphere * car exhaust mixes with chemicals and form smog * burning fuel releases carbon dioxide 5. solids in the atmosphere * dust carried by wind * salt from ocean spray * pollen from plants 6. liquid droplets in the atmosphere * liquid from erupting volcanoes

  5. 7. What are the 5 layers of the atmosphere? troposphere stratosphere mesosphere thermosphere exosphere

  6. Mesosphere: • top of stratosphere to 85 km • shooting stars happen here • temperatures decrease as you get higher • many meteors disintegrate here • Stratosphere: • extends from 10- 50 km • contains ozone layer • temperatures are higher in the upper portion because of ozone molecules • weather balloons float here • Troposphere: • - 99% of water vapor - warmed by heat from Earth’s surface- 75% of atmospheric gases - most clouds and weather form here • eat, play, and, live here • rain, snow, and clouds • extends up to 10 km Earth’s Surface

  7. Outer Space • Exosphere: • - space shuttle orbits here • few air molecules here • high temperatures • 500 km to outer space • Thermosphere: • “hot layer” • thickest layer • 85 – 500 km • high temperatures because first layers to receive Sun’s rays • contains ionosphere- causes radio waves to bounce back to Earth • aurora borealis located here (northern lights)

  8. 1. ionosphere • In the mesosphere and thermosphere • layer of electrically charged particles • allows radio waves to travel (better/farther at night) 2. How does the space shuttle maneuver in the exosphere? - Uses bursts from small rocket thrusters - force exerted on an area 3. pressure 4. Is there more pressure closer to Earth or near the top of the atmosphere? Why? - closer to Earth’s surface because the molecules are closer together and causes the air to be dense

  9. 5. Why is it harder to breathe in high mountains? - there are fewer molecules of air higher up 6. Where does Earth’s energy come from? - the sun 7. Why do the different layers of the atmosphere have different temperatures? - some layers easily absorb the Sun’s energy and some do not 8. What happens to air temperature as you climb higher? - decreases about 6.5° C for every kilometer you climb