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Chapter Introduction Lesson 1 Earth’s Resources Lesson 2 Pollution Lesson 3 Protecting Earth Chapter Wrap-Up. Chapter Menu. How can people protect Earth’s resources?. Chapter Introduction. What do you think?.

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  1. Chapter Introduction Lesson 1 Earth’s Resources Lesson 2 Pollution Lesson 3Protecting Earth Chapter Wrap-Up Chapter Menu

  2. How can people protect Earth’s resources? Chapter Introduction

  3. What do you think? Before you begin, decide if you agree or disagree with each of these statements. As you view this presentation, see if you change your mind about any of the statements. Chapter Introduction

  4. 1. The world’s supply of coal will never run out. 2. You should include minerals in your diet. 3. Global warming causes acid rain. 4. Smog can affect human health. Do you agree or disagree? Chapter Introduction

  5. 5. Oil left over from frying potatoes can be used as automobile fuel. 6. Hybrid electric vehicles cannot travel far or go fast. Do you agree or disagree? Chapter Introduction

  6. Earth’s Resources • What are natural resources? • How do the three types of natural resources differ? Lesson 1 Reading Guide - KC

  7. Earth’s Resources • natural resource • nonrenewable resource • renewable resource • inexhaustible resource • geothermal energy Lesson 1 Reading Guide - Vocab

  8. Natural Resources • Parts of the environment that supply materials useful or necessary for the survival of living things are called natural resources. • Natural resources include land, air, minerals, and fuels. Lesson 1-1

  9. Natural Resources(cont.) What are natural resources? Lesson 1-1

  10. Nonrenewable Resources • Nonrenewable resources are natural resources that are being used up faster than they can be replaced by natural processes. • Nonrenewable resources include fossil fuels and minerals. Lesson 1-2

  11. Nonrenewable Resources(cont.) • Fossil fuels, which formed from the decayed remains of organisms that died millions of years ago, include coal, oil, and natural gas. • Although fossil fuels are forming all the time, we use them much more quickly than nature replaces them. • Fossil fuels are used primarily as sources of energy. Lesson 1-2

  12. Nonrenewable Resources(cont.) • Minerals are nonliving substances that form over millions of years through geologic processes. • Because they take so long to form, most minerals are considered nonrenewable. Lesson 1-2

  13. Nonrenewable Resources(cont.) • Iron is a mineral that can be used to make steel for cars and buildings. • Iron is an important mineral to include in your diet to keep your blood healthy. People with that do not get enough iron can be anemic. Lesson 1-2

  14. Renewable Resources • Supplies of many natural resources, such as water, are constantly renewed by natural cycles. • Renewable resources are natural resources that can be replenished by natural processes at least as quickly as they are used. Lesson 1-3

  15. Renewable Resources(cont.) • Renewable resources include water, air, land, and living things. • If people use any resource faster than it is replaced, it becomes nonrenewable. Lesson 1-3

  16. Renewable Resources(cont.) • Without plants, Earth’s atmosphere would not contain enough oxygen to support most forms of life. • Land resources include topsoil, wildlife, and ecosystems—such as forests, grasslands, deserts, and coral reefs. • All organisms require water to live. People need a reliable supply of freshwater for drinking, washing, and irrigating crops. Lesson 1-3

  17. Inexhaustible Resources • An inexhaustible resource is a natural resource that will not run out, no matter how much of it people use. • Solar energy, wind, and thermal energy from within the Earth are all examples of inexhaustible resources. Lesson 1-4

  18. Inexhaustible Resources(cont.) How do inexhaustible resources differ from renewable and nonrenewable resources? Lesson 1-4

  19. Inexhaustible Resources(cont.) • Solar energy can be harnessed for many uses: • Greenhouses trap heat and make it possible to grow warm-weather plants in cool climates. • Solar cookers concentrate the Sun’s heat to cook food. • Large solar-power plants provide electricity to many homes. Lesson 1-4

  20. Solar energy can be used to heat water for individual homes. Lesson 1-4

  21. Wind is an inexhaustible resource produced by the uneven heating of the atmosphere by the Sun. Lesson 1-4

  22. Inexhaustible Resources(cont.) • Geothermal energy is thermal energy from within the Earth. • Underground water heated by molten rock produces steam used to generate electricity. Lesson 1-5

  23. Inexhaustible Resources(cont.) geothermal from Greek geo–, means “earth”; and Greek therme, means “heat” Lesson 1-5

  24. Living things depend on natural resources such as water, air, and land to meet their needs. • Water is considered a renewable resource. • Wind energy can be transformed into electricity. Lesson 1 - VS

  25. What type of resources can be replenished by natural processes at least as quickly as they are used? A. renewable B. nonrenewable C. inexhaustible D. geothermal Lesson 1 – LR1

  26. What are nonliving substances found in Earth’s crust? A. fossil fuels B. minerals C. solar energy D. turbines Lesson 1 – LR2

  27. Wind is an example of what type of resource? A. renewable B. nonrenewable C. inexhaustible D. fossil fuel Lesson 1 – LR3

  28. 1. The world’s supply of coal will never run out. 2. You should include minerals in your diet. Do you agree or disagree? Lesson 1 - Now

  29. Pollution • How does pollution affect air resources? • How does pollution affect water resources? • How does pollution affect land resources? Lesson 2 Reading Guide - KC

  30. Pollution • pollution • ozone layer • photochemical smog • global warming • acid precipitation Lesson 2 Reading Guide - Vocab

  31. What is pollution? • Pollution is the contamination of the environment with substances that are harmful to life. • Most pollution occurs because of human actions, such as burning fossil fuels or spilling toxic materials. • Pollution also can come from natural disasters like wildfires or volcanic eruptions. Lesson 2-1

  32. Air Pollution • Air pollution that can affect human health and recreational activities can be caused by ozone loss, photochemical smog, global warming, and acid precipitation. • The ozone layer prevents most harmful ultraviolet (UV) radiation from reaching Earth. • UV radiation from the Sun can cause cancer and cataracts and can damage crops. Lesson 2-1

  33. Air Pollution(cont.) • Sunlight reacts with waste gases from the burning of fossil fuels to form a type of air pollution called photochemical smog. • Smog can harm plants and animals and cause lung damage. Lesson 2-1

  34. Air Pollution(cont.) photochemical smog from Greek photo–, means “light”; Latin chemic, means “alchemy”; and modern English smog, blend of “smoke” and “fog” Lesson 2-1

  35. Photochemical smog can worsen throughout the day as chemicals continue to react with sunlight. Lesson 2-1

  36. Air Pollution(cont.) • Global warming is the scientific observation that Earth’s average temperature is increasing. • Global warming can lead to climate change—changing weather conditions, changes to ecosystems and food webs, increases in the number and severity of floods and droughts, and increased coastal flooding as sea ice melts and sea level rises. Lesson 2-1

  37. Air Pollution(cont.) • Acid precipitation is acidic rain or snow that forms when waste gases from automobiles and power plants combine with moisture in the air. • Acid precipitation contributes to water pollution, pollutes soil, and can kill plants, including trees. Lesson 2-1

  38. Air Pollution(cont.) How does pollution affect air resources? Lesson 2-1

  39. Water Pollution • Water pollution can come from chemical runoff and other agricultural, residential, and industrial sources. • Wastewater that drains from showers, sinks, and toilets, and wastewater that comes from industries and mining operations requires treatment to help purify it before it is used again or returned to the environment. Lesson 2-3

  40. Water Pollution(cont.) • Water that flows over the land when it rains is called runoff. • Runoff flows across lawns and farmland where it picks up pesticides, herbicides, and fertilizers. • Runoff carries these pollutants into streams, where they can harm insects, fish, and other organisms. Lesson 2-3

  41. Water Pollution(cont.) How does pollution affect water resources? Lesson 2-3

  42. Land Pollution • Litter can pollute soil and water and disturb wildlife. • Pesticides and other agricultural chemicals become pollutants if they are used in excess or disposed of improperly. Lesson 2-4

  43. Land Pollution(cont.) • Many industrial facilities produce toxic wastes that, if incorrectly stored or disposed of, contaminate soil and water. • Mining of fossil fuels and minerals can disturb or destroy entire ecosystems. Lesson 2-4

  44. Land Pollution(cont.) How does pollution affect land resources? Lesson 2-4

  45. Pollution, the introduction of harmful substances into the environment, can harm humans and other living things. • Smog, ozone loss, global warming, and acid precipitation are caused by air pollutants. • Land and water can be polluted by littering and chemical runoff from homes, factories, mines, and farms. Lesson 2 - VS

  46. What is the scientific observation that Earth’s average temperature is increasing? A. acid precipitation B. global warming C. photochemical smog D. water pollution Lesson 2 – LR1

  47. Which term refers to water that flows over the land when it rains? A. acid precipitation B. photochemical smog C. runoff D. sediment Lesson 2 – LR2

  48. What is the result of sunlight reacting with waste gases from the burning of fossil fuels? A. runoff B. photochemical smog C. ozone layer D. acid precipitation Lesson 2 – LR3

  49. Do you agree or disagree? 3. Global warming causes acid rain. 4. Smog can affect human health. Lesson 2 - Now

  50. Protecting Earth • How can people monitor resource use? • How can people conserve resources? Lesson 3 Reading Guide - KC

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