1. Sources of Energy
12.1 pg

2. Renewable vs. Non-Renewable
Renewable Resources- one that can be reused or replaced like the sun and the wind. Non-Renewable Resources Cannot be replaced once used up. Coal and oil

3. FOSSIL FUELS NON-RENEWABLE
Coal, oil, natural gas are produced from the organic matter of organisms that lived millions of years ago. The fossil fuel is burned in a generator to boil water. The steam is kept under pressure in pipes, which allows it to reach higher temp. than normal. The high pressure steam strikes and pushes the blades on the turbine

4. FOSSIL FUEL
ADVANTAGE
produced from organic matter that already existed.
Inexpensive
DISADVANTAGE Pollution Mining Coal is hazardous to workers

5. NUCLEAR NON-RENEWABLE
In a nuclear reactor, atoms of a heavy element, usually Uranium, are split in a chain reaction. (called nuclear fission) Nuclear Fission releases an enormous amount of energy. The energy is used to heat water to produce steam to turn a turbine

6. NUCLEAR ADVANTAGE Nuclear Fission releases a large amount of energy.
Not costly
DISADVANTAGE
Disposal of Uranium Waste is a downfall because it is radioactive and needs to be stored carefully for hundreds of years.

7. HYDROELECTRIC RENEWABLE
How Energy is Produced Water flows through a penstock. As it flows past the turbine, it causes the turbine to turn. The turning turbine is connected to the generator. The generator converts the energy from the turning turbine to electrical energy.

8. HYDROELECTRIC
ADVANTAGE Flowing water is a natural resource Inexpensive
DISADVANTAGE
Some communities do not have a waterfall, so a dam may be built across a river to store water.
Huge environmental impact when dams are created

9. SOLAR RENEWABLE
A solar cell has specially treated layers that create current when exposed to sunlight A solar farm includes arrays of mirrors that focus sunlight onto a liquid that is heated and used to turn water into steam to drive the turbines.

10. SOLAR RENEWABLE
ADVANTAGE A natural resource that doesn’t cause pollution Convenient for small appliances like calculators
DISADVANTAGE Costly to implement Depends on amount of sunlight

11. TIDAL ENERGY
Uses the energy of the gravitational pull of the Moon. The powerful tide turns a turbine, to provide electricity.

12. TIDAL ENERGY ADVANTAGE Natural resource Not costly
DISADVANTAGE Can only be used in certain locations

13. WIND RENEWABLE
Use the energy of moving air to spin their blades, which are connected to a generator. The amount of energy depends on wind speed.

14. WIND ADVANTAGE Natural resource No pollution like greenhouse gases
DISADVANTAGE
Depends on wind speed
Barriers to bird movement, and bird fatalities
Disrupts ecosystems
Uses a lot of land
Windmills costly to build