5.6 alternative resources

Alternative Energy Sources

Alternative Sources

As the supply of fossil fuels is diminishing,

the nation looks for alternating ways to

replenish its renewable energy resources.

3 types of renewable energy;– Solar Energy– Geothermal Energy– Energy from water & wind

Solar Energy

• Passive system: Collect heat from the sun, such as building a house with windows facing toward the sun.

• Active system: Using solar collectors to provide heat.

Geothermal Energy

• Energy from the heat of the interior earth.

• Water in rocks is heated by magma.

• Energy has been trapped by drilling wills to reach the hot water.

• Power turbines generate electricity from this energy.

Energy by Water and Wind

• Energy from Running Water– Hydroelectric energy is

produced by running water.

– Massive dams hold back running water and move it through the plant.

– The force of water spins the turbines of electrical generators to produce electricity.

Energy from Tides

• The ocean waters that move into and away from the shore twice a day are called tides.

• Dams are built to trap water at high tide and release water at low tides

Energy from Wind

• Propeller wind turbines, on wind farms, can produce enough energy for a whole community.

• Only certain areas have enough wind for this to succeed (example: Bay area)