sources of energy – part 2 glencoe - chapter 16 pages 484-515
TRANSCRIPT
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Sources of Energy – Part 2
Glencoe - Chapter 16
Pages 484-515
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Renewable Energy Resources1. Solar energy – capturing the energy given
off by the sun
- Photovoltaic cells (solar cells) convert sunlight into electricity as electrons gain energy and move
- The electricity is
stored in batteries
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Photovoltaic Solar Cell
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Renewable Energy Resources2. Hydroelectric energy – produced by
running / moving water from rivers flowing
- Water is held
behind a dam
and released
in a controlled
way to spin
turbines
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Cross-section of a Hydroelectric Dam
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Renewable Energy Resources
3. Tidal energy – produced by moving water as tides rise and fall and spins a turbine
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Tidal Energy Turbines
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Renewable Energy Resources4. Wind energy – produced by moving air
spinning a windmill which spins a turbine
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Renewable Energy Resources
5. Geothermal energy – produced by harnessing the heat from hot magma near the surface of the earth
Cold water is pumped down into the ground, heated by the magma, and then the hot water is pumped up to be used and turned into steam
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Geyser
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Geothermal Energy
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Renewable Energy Resources
6. Biomass energy – organic waste / trash materials
Sources include: wood, manure, food wastes, and some types of trash
These wastes can be burned to release energy as heat
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Types of Biomass
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Renewable Energy Resources
7. Hydrogen gas fuel – hydrogen gas (H2) is burned to release energy
Hydrogen gas is burned in the presence of oxygen gas, which releases energy from chemical bonds, and forms water as a waste product
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How We Get Electricity From Sources of Energy.
• No matter what energy source you use (except solar energy), to get electricity from it, a turbine must spin around.
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How We Get Electricity From Sources of Energy.
• The turbine is attached to a generator, so as the turbine spins, the generator also spins.
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How We Get Electricity From Sources of Energy.
• The generator is composed of wires spinning inside magnets. As the wires spin, an electric current is formed in the wires, which is transferred to the consumers in power lines.