The kinetic energy of the Advantage: wind rotates a large Wind power will never run out. Wind propeller which turns a Disadvantages: generator to produce The wind does not always blow. electricity. Wind turbines are unsightly. Windmills require a lot of land. Water stored behind a Advantage: dam is allowed to flow Electricity available when Hydro down the hill to drive a required. electricity large turbine and Disadvantages: generator which Building dams and flooding produces electricity. valleys destroys areas of natural beauty and kills large numbers of wildlife. Movement of the waves Advantage: can be changed into Wave energy will never run out. Wave electrical energy using Disadvantages: the motion of the waves Wave equipment is expensive to turn a turbine and and may be a danger to ships. generator to produce Waves vary in size. electricity. quantities of water Advantage: are trapped behind tidal Tidal energy will never run out. barrages. On the Disadvantages: outgoing tide, the water There are few suitable locations. is released and used to The eco system near the dam is drive water turbines to changed drastically. produce electricity. Heat inside the earth can Advantage: be used to heat water. Geothermal energy is renewable. Steam formed when the Disadvantages: water boils can be used There are only a few useful to drive a turbine to locations generate electricity. Deep drilling is expensive. Wood and plants may be Advantage: burned to produce Biomass is renewable. Biomass energy. Disadvantage: Plant growth is too slow to provide large amounts of energy.
Wind The kinetic energy of the wind rotates a large propeller which turns a generator to produce electricity. Advantage: Wind power will never run out. Disadvantages: The wind does not always blow. Wind turbines are unsightly. Windmills require a lot of land. Hydro electricity Water stored behind a dam is allowed to flow down the hill to drive a large turbine and generator which produces electricity. Advantage: Electricity available when required. Disadvantages: Building dams and flooding valleys destroys areas of natural beauty and kills large numbers of wildlife. Wave Movement of the waves can be changed into electrical energy using the motion of the waves to turn a turbine and generator to produce electricity. Advantage: Wave energy will never run out. Disadvantages: Wave equipment is expensive and may be a danger to ships. Waves vary in size. quantities of water are trapped behind tidal barrages. On the outgoing tide, the water is released and used to drive water turbines to produce electricity. Advantage: Tidal energy will never run out. Disadvantages: There are few suitable locations. The eco system near the dam is changed drastically. Heat inside the earth can be used to heat water. Steam formed when the water boils can be used to drive a turbine to generate electricity. Advantage: Geothermal energy is renewable. Disadvantages: There are only a few useful locations Deep drilling is expensive. Biomass Wood and plants may be burned to produce energy. Advantage: Biomass is renewable. Disadvantage: Plant growth is too slow to provide large amounts of energy.
Unit-1-Electricity-and-Energy-Summary-part-1.docx