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Chapter 12 Section 1: Resources

Chapter 12 Section 1: Resources. Objectives:. Compare renewable and nonrenewable resources List uses of fossil fuels and alternatives Describe types of pollution Understand the Greenhouse effect. Mastering objectives will help me:. Recognize ways you can reduce your use of natural resources

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Chapter 12 Section 1: Resources

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  1. Chapter 12 Section 1: Resources

  2. Objectives: • Compare renewable and nonrenewable resources • List uses of fossil fuels and alternatives • Describe types of pollution • Understand the Greenhouse effect

  3. Mastering objectives will help me: • Recognize ways you can reduce your use of natural resources • Understand how you can promote conservation

  4. Natural resources: the parts of the environment that are useful or necessary for the survival of living organisms. • Renewable resource: any natural resource that is recycled or replaced constantly by nature. • Non-renewable resource: natural resources that are used up more quickly than they can be replaced by natural processes. • Fossil fuels- fuels formed in the Earth’s crust over hundreds of millions of years

  5. Natural Resources • Two types: renewable and nonrenewable

  6. Renewable Resource • Includes: water, sunlight, air, crops • Can go into short supply under certain circumstances, like a drought

  7. Nonrenewable Resource • This includes: plastics, paints, and gasoline (made from petroleum or oil)

  8. Fossil Fuels • Coal, oil, and natural gas are fossil fuels. • Using these causes many environmental problems • they require mining to retrieve them

  9. Alternatives to Fossil Fuels

  10. Water Power • hydroelectric power • Downside: environmental problems, building dams and obstructing wildlife

  11. Wind Power • Wind turns the blades of a turbine which powers a generator • Downside: electricity can only be produced when wind is blowing

  12. Nuclear Power • Nuclear energy is released in a chemical reaction • Downside: uranium is radioactive, and it is a nonrenewable source that must be mined

  13. Geothermal Energy • Heat within the Earth’s crust • Uses steam to produce electricity • Downside: only available near geysers or volcanoes

  14. Solar Energy • Using the energy from the sun to produce electricity • Downside: highly expensive; can store heat throughout the day to give electricity at night, but what if there is no sun for a few days?

  15. Solar Cells • Photovoltaic (PV) cells need sunlight to produce electricity • Downside: expensive to use for large things, and does not store energy

  16. Chapter 12 Section 2: Pollution

  17. Pollution A pollutant is a substance that contaminates the environment.

  18. Greenhouse Effect • This is the heat trapping feature of Earth • Draw and label figure 13 on page 370

  19. Global Warming and Ozone Depletion • Temperature collected over the past 100 years shows that the average temperature is rising. • No one knows if this is caused by humans or just the Earth’s natural cycle. • The ozone layer absorbs most of the harmful ultraviolet radiation from the sun. • The ozone layer temporarily thins each year over the polar regions during the spring. This is called ozone depletion.

  20. Water Pollution • Can happen by dumping litter or waste materials into rivers, lakes, and oceans. • Rivers bring pollutants to oceans, and oceans are polluted by oil spills.

  21. Hazardous Wastes • They include pesticides, oil, petroleum based solvents, and radioactive waste from power plants and hospitals.

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