RENEWABLE RESOURCES<br />8SCIENCE: Wed. Jan. 12/Thurs. Jan. 13<br />
What are renewable resources?<br />Renewable resources are natural resources that can be recycled or replaced by the envir...
How do we use renewable resources?<br />Humans use renewable resources as a source of food (plants and animals) to help us...
SOLAR ENERGY<br />Solar energy is energy from the sun<br />It is trapped in solar cells and turned into electric current <...
WIND ENERGY<br />Electricity can be produced on wind farms<br />Wind turbines are placed on the land <br />Need lots of op...
WATER ENERGY<br />Called hydroelectric power<br />Electricity created from the energy of flowing water by building dams<br...
GEOTHERMAL ENERGY<br />Used and found in locations with lots of volcanic activity<br />Energy from an eruption comes from ...
NUCLEAR ENERGY<br />Huge amounts of energy are stored in the nucleus of an atom<br />When this nucleus is split, the energ...
Questions to consider: Which renewable energy is ‘best’?<br />Which renewable energy type is a good alternative to burning...
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Renewable resources

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Renewable resources

  1. 1. RENEWABLE RESOURCES<br />8SCIENCE: Wed. Jan. 12/Thurs. Jan. 13<br />
  2. 2. What are renewable resources?<br />Renewable resources are natural resources that can be recycled or replaced by the environment<br />E.g.: Cotton plants to make clothing i.e. jeans can be planted again each year<br />Examples<br />Plants and animals<br />Wind <br />Geothermal <br />Nuclear <br />Water (hydro) <br />
  3. 3. How do we use renewable resources?<br />Humans use renewable resources as a source of food (plants and animals) to help us survive<br />We also use renewable resources to provide energy and power <br />Examples: <br />Solar energy: solar cells<br />Wind energy: wind farms<br />Water energy: dams<br />
  4. 4. SOLAR ENERGY<br />Solar energy is energy from the sun<br />It is trapped in solar cells and turned into electric current <br />Sunlight hits cells covered with silicon (Si) layers, changes the light and a stream of electrons is created<br />Solar cells can be small and easy to use<br />Expensive to generate largeamounts of electricity<br />
  5. 5. WIND ENERGY<br />Electricity can be produced on wind farms<br />Wind turbines are placed on the land <br />Need lots of open space<br />No pollution is produced<br />
  6. 6. WATER ENERGY<br />Called hydroelectric power<br />Electricity created from the energy of flowing water by building dams<br />Earth’s water cycle continually replaces the water and it is non-polluting<br />
  7. 7. GEOTHERMAL ENERGY<br />Used and found in locations with lots of volcanic activity<br />Energy from an eruption comes from hot rock under the Earth’s surface<br />Thermal energy (heat energy) is used to generate electricity<br />
  8. 8. NUCLEAR ENERGY<br />Huge amounts of energy are stored in the nucleus of an atom<br />When this nucleus is split, the energy released is used to generate electricity<br />water is heated by this energy and turns to steam which turns turbines to produce electricity<br /> Examples: - uranium (U)<br />
  9. 9. Questions to consider: Which renewable energy is ‘best’?<br />Which renewable energy type is a good alternative to burning fossil fuels (using non-renewable resources) ?<br />Which renewable energy type produces little pollution?<br />Which renewable energy type costs little money?<br />Which renewable energy type requires little land and people to manage it?<br />

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