Sources of Energy – Part 2 Glencoe - Chapter 16 Pages 484-515.

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Sources of Energy – Part 2 Glencoe - Chapter 16 Pages

Renewable Energy Resources 1. 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

Photovoltaic Solar Cell

Renewable Energy Resources 2. 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

Cross-section of a Hydroelectric Dam

Renewable Energy Resources 3. Tidal energy – produced by moving water as tides rise and fall and spins a turbine

Tidal Energy Turbines

Renewable Energy Resources 4. Wind energy – produced by moving air spinning a windmill which spins a turbine

Two Types of Windmills

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

Geyser

Geothermal Energy

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

Types of Biomass

Renewable Energy Resources 7. Hydrogen gas fuel – hydrogen gas (H 2 ) 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

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.

How We Get Electricity From Sources of Energy. The turbine is attached to a generator, so as the turbine spins, the generator also spins.

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.

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