Presentation on theme: "Energy Fact or Fiction: Determine if the following statements are fact or fiction."— Presentation transcript:
Energy Fact or Fiction: Determine if the following statements are fact or fiction
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.
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.
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.
Traditional Energy Resources
Fact or Fiction – Answers 1.Petroleum is the ultimate source of energy on Earth. –Fiction 2.Traditional sources of energy come from plants. –Fact
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.
Traditional Sources of Energy Wood –most commonly used biomass fuel –Used for thousands of years
Traditional Sources of Energy Field Crops –Used as fuel when wood is scarce. The simplest way – burn them
Traditional Sources of Energy Fecal Material –Feces are the solid wastes of animals. –used when have limited forest resources
Traditional Sources of Energy Peat –formed when dead plant material is compressed in a bog –burns better than wood –a fossil fuel
Fact or Fiction – Answers 3.Fossil fuels are available in limitless supplies. Fiction
Fossil Fuels formed over geologic time nonrenewable -- millions of years
Fact or Fiction – Answers 4.The stored energy in petroleum originally came from the Sun. Fact
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
Fossil Fuels Coal –formed from compressed organic matter in ancient swamps.
Fossil Fuels Petroleum –natural crude oil –formed in shallow seas
Fact or Fiction – Answers 5.Natural gas is formed from the remains of living things. Fact
Fossil Fuels Natural Gas –Methane -- bacteria –colorless, shapeless, and odorless
Alternative Energy Resources
Petroleum - 50 years?? Coal - 150 years?? –At current usage rates! –Are rates going to stay the same?
Fact or Fiction – Answers 6.Alternative energy sources are renewable sources. Fact (most of them)
Solar Energy The Sun is the ultimate source of energy on Earth. The main advantages –Free –No pollution
Fact or Fiction – Answers 7.Solar heating uses fans to distribute heat. Fiction
Solar Energy Passive Solar Heating –Sun shining through a window –Sun shining on bricks, asphalt – heat can be released at night.
Solar Energy Active Solar Heating –solar panels collect light –fans and pumps distribute heat
Solar Energy Photovoltaic Cells –convert solar energy into electrical energy that is stored in batteries
Fact or Fiction – Answers 8.There are no drawbacks to using hydroelectric power. Fiction
Hydroelectric Power energy produced by moving water 20% of the world’s electricity
Aswan High Dam
Three Gorges Dam
How it Works
Advantages Controls flooding Low operating and maintenance costs No polluting waste products Long (but finite) life spans Areas of recreation
Disadvantages Controls flooding Large flooded areas; people displaced Slow moving water pathogen breeding ground Destroy habitat Disrupt fish migration
Tidal Power Energy from the Oceans –energy in waves used to generate electricity –may disrupt coastal and marine ecosystems
Fact or Fiction – Answers 9.Energy obtained directly from heat in the earth’s crust is called geothermal energy. Fact
Geothermal Energy energy produced by steam and hot water generated by Earth’s own internal heat
Geothermal Energy Advantages: –abundant and reliable Disadvantages: –must be managed carefully –contains large amount of minerals - pollution –Transporting is not practical
Fact or Fiction – Answers 10.Wind is one of the least expensive ways to produce electricity. Fact
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
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
Fact or Fiction – Answers 11.Nuclear fuel is a nonrenewable resource. 12.No greenhouse gases are released from nuclear power plants. Fact
Nuclear Energy During nuclear fission, atoms are split, releasing large amount of energy Uranium is commonly used 17% of the world’s electricity
No new nuclear plants have been built in the United States since 1978. –Poor management –Costs –poor designs
Nuclear Energy Advantages –Lots of energy available –No greenhouse gases –Uranium available Disadvantages –Nuclear waste storage –Radiation accidents –Weapons?
Fact or Fiction – Answers 13.Biomass energy sources are nonpolluting. Fiction
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
Biomass Ethanol –Made from sugar and grain crops –Grain alcohol Methanol –Made mostly from natural gas –Wood alcohol
Biomass Biogas –Made from plant and animal waste Biodiesel –Manufactured from vegetable oils, animal fats, or recycled restaurant greases
Fact or Fiction – Answers 14.Shale oil is profitable to extract and refine. Fiction
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