1. Alternative Energy

2. Alternative Energy Definition:
Energy sources that are still in development
Criteria that needs to be met in order to be an Alternative Energy Source:
Cost effective
Causes little damage to the environment

3. Tidal Power Definition:
Using energy produced by tides to generate electricity

4. Tidal Power Plant

5. How Tidal Power Works
1) As the tide rises water enters a bay behind a dam
2) The gates of the dam close
3) At low tide the gates of the dam open allowing the water in the bay to rush through
4) The rushing water spins a turbine inside the dam that produces electricity

6. Pros and Cons of Tidal Power
Renewable
Does not cause pollution
Cons
Very expensive to build a tidal power plant
There are only a few locations where one can be built

7. Tidal Power Plant Clip

8. Ocean Thermal Energy Conversion (OTEC)
Definition:
The use of temperature differences in ocean water to produce electricity

9. OTEC Plant

10. OTEC Plant 1) Warm ocean surface water is pumped up to be boiled
2) Steam is produced during boiling process
3) Steam turns turbine which turns an electric generator
4) Electricity is produced
5) Deep cold ocean water is pumped up to cool the steam
6) Water is returned to the ocean

11. Pros and Cons of OTEC Pros Renewable Cons
Requires 1/3 of the energy it produces to run plant
Environmental effects are unknown

12. OTEC Clip

13. Hydrogen Power
Definition:
Using hydrogen as a source of energy

14. Hydrogen Fuel Cells

15. Hydrogen Fuel Cells
1) Hydrogen passes through the negative end of the fuel cell
2) Then hydrogen releases electrons which are used as electrical energy
3) Oxygen passes through the positive end of the fuel cell
4) When oxygen combines with hydrogen water is produced and released

16. Pros and Cons of Hydrogen Fuel Cells
Water is a harmless byproduct
Con
Expensive
More hydrogen is needed to produce the same amount of energy as gasoline

17. Hybrid Cars Definition:
Cars that run on a combination electric motor and internal combustion engine

18. Animation on How a Hybrid Car Works

19. Energy Efficiency Definition:
A product that uses less energy to perform a function
Example:
Fluorescent light bulb uses less energy than an incandescent light bulb

20. Energy Efficiency of Common Items

21. Energy Conservation Definition:
Any behavior that results in the use of less energy
Example:
Turning off the lights in a room when you are not using it

22. With a partner think up 5 additional ways we can save energy in our homes everyday.

23. Energy Conservation Ideas

24. How to Save Energy in Your Home