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Energy Fact or Fiction: Determine if the following statements are fact or fiction.

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Presentation on theme: "Energy Fact or Fiction: Determine if the following statements are fact or fiction."— Presentation transcript:

1 Energy Fact or Fiction: Determine if the following statements are fact or fiction

2 Fact or Fiction 1.Petroleum is the ultimate source of energy on Earth. 2.Traditional sources of energy come from plants. 3.Fossil fuels are available in limitless supplies. 4.The stored energy in petroleum originally came from the Sun. 5.Natural gas is formed from the remains of living things.

3 Fact or Fiction 6.Alternative energy sources are renewable sources. 7.Solar heating uses fans to distribute heat. 8.There are no drawbacks to using hydroelectric power. 9.Energy obtained directly from heat in the earth’s crust is called geothermal energy.

4 Fact or Fiction 10.Wind is one of the least expensive ways to produce electricity. 11.Nuclear fuel is a nonrenewable resource. 12.No greenhouse gases are released from nuclear power plants. 13.Biomass energy sources are nonpolluting. 14.Shale oil is profitable to extract and refine.

5 Traditional Energy Resources

6 Fact or Fiction – Answers 1.Petroleum is the ultimate source of energy on Earth. –Fiction 2.Traditional sources of energy come from plants. –Fact

7 Transfer of Solar Energy The Sun is the ultimate source of energy on Earth. Fuels are materials that are burned to produce heat or power.

8 Traditional Sources of Energy Wood –most commonly used biomass fuel –Used for thousands of years

9 Traditional Sources of Energy Field Crops –Used as fuel when wood is scarce. The simplest way – burn them

10 Traditional Sources of Energy Fecal Material –Feces are the solid wastes of animals. –used when have limited forest resources

11 Traditional Sources of Energy Peat –formed when dead plant material is compressed in a bog –burns better than wood –a fossil fuel

12 Fact or Fiction – Answers 3.Fossil fuels are available in limitless supplies. Fiction

13 Fossil Fuels formed over geologic time nonrenewable -- millions of years

14 Fact or Fiction – Answers 4.The stored energy in petroleum originally came from the Sun. Fact

15 Fossil Fuels formed from plants and animals that lived 300 million years ago in swamps and oceans the plants and animals died and decomposed under tons of rock and ancient seas

16 Fossil Fuels Coal –formed from compressed organic matter in ancient swamps.

17 Fossil Fuels Petroleum –natural crude oil –formed in shallow seas

18

19 Fact or Fiction – Answers 5.Natural gas is formed from the remains of living things. Fact

20 Fossil Fuels Natural Gas –Methane -- bacteria –colorless, shapeless, and odorless

21 Alternative Energy Resources

22 Petroleum - 50 years?? Coal years?? –At current usage rates! –Are rates going to stay the same?

23 Fact or Fiction – Answers 6.Alternative energy sources are renewable sources. Fact (most of them)

24 Solar Energy The Sun is the ultimate source of energy on Earth. The main advantages –Free –No pollution

25 Fact or Fiction – Answers 7.Solar heating uses fans to distribute heat. Fiction

26 Solar Energy Passive Solar Heating –Sun shining through a window –Sun shining on bricks, asphalt – heat can be released at night.

27 Solar Energy Active Solar Heating –solar panels collect light –fans and pumps distribute heat

28 Solar Energy Photovoltaic Cells –convert solar energy into electrical energy that is stored in batteries

29 Fact or Fiction – Answers 8.There are no drawbacks to using hydroelectric power. Fiction

30 Hydroelectric Power energy produced by moving water 20% of the world’s electricity

31 Aswan High Dam

32 Three Gorges Dam

33

34 How it Works

35 Advantages Controls flooding Low operating and maintenance costs No polluting waste products Long (but finite) life spans Areas of recreation

36 Disadvantages Controls flooding Large flooded areas; people displaced Slow moving water  pathogen breeding ground Destroy habitat Disrupt fish migration

37 Disadvantages Sedimentation –Dredging –Sediments don’t enrich farmland Expensive to build Destroys rivers Earthquakes

38 More Dams? Not in US -- why not? Outside US?

39 Tidal Power Energy from the Oceans –energy in waves used to generate electricity –may disrupt coastal and marine ecosystems

40 Fact or Fiction – Answers 9.Energy obtained directly from heat in the earth’s crust is called geothermal energy. Fact

41 Geothermal Energy energy produced by steam and hot water generated by Earth’s own internal heat

42 Geothermal Energy Advantages: –abundant and reliable Disadvantages: –must be managed carefully –contains large amount of minerals - pollution –Transporting is not practical

43 Fact or Fiction – Answers 10.Wind is one of the least expensive ways to produce electricity. Fact

44

45 Wind Energy Wind  mechanical energy  electrical energy Most wind farms are in California, –ND, SD, and TX have the best locations 10% of the world’s electricity by the year 2050

46 Wind Energy Advantages: –virtually unlimited –nonpolluting –can be built quickly –inexpensive, but only in areas with steady winds Disadvantages: –not very attractive –may interfere with and even kill birds –requires land lease/purchase

47 Fact or Fiction – Answers 11.Nuclear fuel is a nonrenewable resource. 12.No greenhouse gases are released from nuclear power plants. Fact

48 Nuclear Energy During nuclear fission, atoms are split, releasing large amount of energy Uranium is commonly used 17% of the world’s electricity

49 Nuclear Energy

50 No new nuclear plants have been built in the United States since –Poor management –Costs –poor designs

51 Nuclear Energy Advantages –Lots of energy available –No greenhouse gases –Uranium available Disadvantages –Nuclear waste storage –Radiation accidents –Weapons?

52 Nuclear Energy

53 Fact or Fiction – Answers 13.Biomass energy sources are nonpolluting. Fiction

54 Biomass Biomass is a renewable energy resource – as long as the organisms are replaced. –Not wood, field crops Disadvantage –release carbon dioxide and particulate matter

55 Biomass Ethanol –Made from sugar and grain crops –Grain alcohol Methanol –Made mostly from natural gas –Wood alcohol

56 Biomass Biogas –Made from plant and animal waste Biodiesel –Manufactured from vegetable oils, animal fats, or recycled restaurant greases

57 Fact or Fiction – Answers 14.Shale oil is profitable to extract and refine. Fiction

58 Energy from Oil Shale and Tar Sand Oil shale is heated to form oil known as shale oil. The cost of processing oil shale is higher than the cost of traditional crude oil. –requires lots of energy –produces air and water pollution

59 Powering the Planet


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