1. Alternative Energy Resources Renewable Resources

3. Solar  http://www.youtube.com/watch?v=27KZ0ng6 VO4 http://www.youtube.com/watch?v=27KZ0ng6 VO4

4.  How It Works photovoltaic or photoelectric cells are used to convert sunlight directly into electricity  Advantage free, needs no fuel, produces no waste or pollution, safe  Disadvantage large power cells are expensive, needs mostly sunny climate, energy has to be stored  Uses heat water, cook food, power lights, used on satellites  Renewable yes – as long as the Sun remains burning Solar Energy from the Sun

5. photovoltaic or photoelectric cells

6.  http://www.youtube.com/watch?v=8OkVQH moIoI http://www.youtube.com/watch?v=8OkVQH moIoI

7.  How It Works wind is converted into electrical or mechanical energy  Advantage free, needs no fuel, produces no pollution  Disadvantage doesn’t work without wind, can be noisy, may kill birds  Uses produce electricity, used on satellites  Renewable yes – as long as the Sun heats the air and causes winds Wind Energy from Moving Air

8.  http://www.youtube.com/watch?v=tSBACzRE 3Gw http://www.youtube.com/watch?v=tSBACzRE 3Gw

9. Waves Energy from the Ocean  How It Works wind is converted into electrical or mechanical energy  Advantage free, needs no fuel, produces no waste, can produce a great deal of energy  Disadvantage needs strong and consistent waves, can be noisy, equipment must be able to withstand very rough weather  Uses produce electricity  Renewable yes – as long as wind blows across water

10.  http://www.youtube.com/watch?v=kjpp2MQf fnw&feature=related http://www.youtube.com/watch?v=kjpp2MQf fnw&feature=related

11. Geothermal Energy from Below the Crust  How It Works steam is collected and used to drive a turbine  Advantage needs little or no fuel, little impact on the environment  Disadvantage dangerous gases can come up from underground, can’t build power plant just anywhere  Uses produce electricity, heat homes  Renewable yes – as long the rocks remain heated by magma

12.  http://www.youtube.com/watch?v=cEL7yc8R 42k http://www.youtube.com/watch?v=cEL7yc8R 42k

13. Hydroelectric Energy from Falling Water  How It Works the kinetic energy of falling water is converted to electrical energy  Advantage very reliable, water can be stored in dams for future use  Disadvantage expensive to build dams, causes upstream flooding  Uses produce electricity, heat/cool homes  Renewable yes – as long as the water cycle continues

14.  http://www.youtube.com/watch?v=kjpp2MQf fnw&feature=related http://www.youtube.com/watch?v=kjpp2MQf fnw&feature=related

15. Biofuel Energy from Organic Material  How It Works Biofuel energy works by using fuels derived from living or dead biological organisms.  Advantage reduces waste materials, fuel tends to be cheap  Disadvantage when burned it creates greenhouse gases  Uses replaces gasoline or diesel for vehicles  Renewable yes – as long as there is organic material/waste being produced

16.  Tidal uses the tides to generate energy  Nuclear splits the atom to produce energy  Waste burns garbage to produce energy  Hydrogen Cells converts hydrogen gas and oxygen to electricity All forms of energy have advantages and disadvantages. Energy from Other Sources