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the BIG idea. CHAPTER OUTLINE. CHAPTER RESOURCES. CHAPTER. NEW CHAPTER. Earth’s Changing Atmosphere. Earth’s atmosphere is a blanket of gases that supports and protects life. 6.1. Earth’s atmosphere supports life. 6.2. The Sun supplies the atmosphere’s energy. 6.3.

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NEW CHAPTER

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  1. theBIGidea CHAPTER OUTLINE CHAPTER RESOURCES CHAPTER NEW CHAPTER Earth’s Changing Atmosphere Earth’s atmosphere is a blanket of gases that supports and protects life. 6.1 Earth’s atmosphere supports life. 6.2 The Sun supplies the atmosphere’s energy. 6.3 Gases in the atmosphere absorb radiation. 6.4 Human activities affect the atmosphere.

  2. Gases of Earth's Atmosphere click image to enlarge 6.1 Earth’s atmosphere supports life. The atmosphere is a thin layer surrounding Earth. Gases in the atmosphere provide substances essential for living things. Natural cycles and sudden changes affect the atmosphere. atmosphere altitude density cycle CHAPTER RESOURCES SECTION OUTLINE

  3. Transfer of Energy Radiation, conduction, and convection move energy from place to place. 6.2 The Sun supplies the atmosphere’s energy. Energy from the Sun moves through Earth's atmosphere in three ways. radiation conduction convection CHAPTER RESOURCES SECTION OUTLINE

  4. VISUALIZATION See radiation, conduction, and convection in action. 6.2 The Sun supplies the atmosphere’s energy. Energy from the Sun moves through Earth's atmosphere in three ways. radiation conduction convection CHAPTER RESOURCES SECTION OUTLINE

  5. 6.2 The Sun supplies the atmosphere’s energy. Density and temperature change with altitude. The layers, from top to bottom, are radiation conduction • thermosphere convection • mesosphere • stratosphere • troposphere CHAPTER RESOURCES SECTION OUTLINE

  6. 6.3 Gases in the atmosphere absorb radiation. Ozone molecules in the stratosphere absorb harmful ultraviolet radiation. ultraviolet radiation infrared radiation ozone greenhouse effect greenhouse gas CHAPTER RESOURCES SECTION OUTLINE

  7. 6.3 Gases in the atmosphere absorb radiation. Greenhouse gases in the troposphere keep Earth warm by absorbing and emitting infrared radiation. ultraviolet radiation infrared radiation ozone greenhouse effect greenhouse gas CHAPTER RESOURCES SECTION OUTLINE

  8. VISUALIZATION CLASSZONE.COM See how the greenhouse effect works. 6.3 Gases in the atmosphere absorb radiation. Greenhouse gases in the troposphere keep Earth warm by absorbing and emitting infrared radiation. ultraviolet radiation infrared radiation ozone greenhouse effect greenhouse gas CHAPTER RESOURCES SECTION OUTLINE

  9. Natural Sources • dust, pollen, soil, salt • volcanoes and forest fires: gases and particles Human Activities • fossil fuels: gases and particles • unburned fuels: smog • manufacturing: gases and particles • tractors/construction equipment: dust and soil • farming: fertilizers and pesticides 6.4 Human activities affect the atmosphere. Human activities have added pollutants and ozone-destroying chemicals to the atmosphere. air pollution particulate fossil fuel smog CHAPTER RESOURCES SECTION OUTLINE

  10. 6.4 Human activities affect the atmosphere. The amounts of greenhouse gases have been increasing and global temperatures are rising. air pollution particulate fossil fuel smog CHAPTER RESOURCES SECTION OUTLINE

  11. 6.1 Earth’s atmosphere supports life. I. Earth’s atmosphere supports life. atmosphere • A. The atmosphere makes life on Earth possible. altitude • 1. Characteristics of the Atmosphere density • 2. Materials in the Atmosphere cycle • B. Natural processes modify the atmosphere. • 1. Ongoing Processes • 2. Sudden Changes CHAPTER RESOURCES KEY CONCEPT SUMMARY

  12. 6.2 The Sun supplies the atmosphere’s energy. II. The Sun supplies the atmosphere’s energy. radiation • A. Energy from the Sun heats the atmosphere. conduction • B. The atmosphere moves energy. convection • C. The atmosphere has temperature layers. CHAPTER RESOURCES KEY CONCEPT SUMMARY

  13. 6.3 Gases in the atmosphere absorb radiation. III. Gases in the atmosphere absorb radiation. ultraviolet radiation • A. Gases can absorb and give off radiation. infrared radiation • B. The ozone layer protects life from harmful radiation. ozone greenhouse effect • C. The greenhouse effect keeps Earth warm. greenhouse gas CHAPTER RESOURCES KEY CONCEPT SUMMARY

  14. 6.4 Human activities affect the atmosphere. IV. Human activities affect the atmosphere. air pollution • A. Human activity can cause air pollution. particulate • 1. Types of Pollution fossil fuel • 2. Effects of Pollution smog • 3. Controlling Pollution • B. Human activities are increasing greenhouse • gases. • 1. Sources of Greenhouse Gases • 2. Global Warming • 3. Reducing Greenhouse Gases CHAPTER RESOURCES • C. Human activities produce chemicals that destroy the ozone layer. KEY CONCEPT SUMMARY

  15. CLASSZONE.COM CHAPTER HOME Chapter Resources Image Gallery Click here to review chapter images and animations Review Game Play a fun interactive review game Animations Link to all the McDougal Littell Science animations Click on the items below to access resources on Resource Centers Get more information on select science topics Audio Readings Hear chapter audio readings Content Review Review key concepts and vocabulary Standardized Test Practice Practice state standardized tests Math Tutorial Review math concepts BACK TO CHAPTER

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