1. Alternative Energy
A Source of renewable energy, such as solar, wind, geothermal, and biofuels.

2. Fuels made from plant materials.
Biofuels
Fuels made from plant materials.

3. Wind Energy
Energy that comes from harnessing the movement of the air.

4. Solar Energy
Energy that comes from the sun.

5. Geothermal Energy
Energy extracted from heat stored inside the earth.

6. Hydroelectric
Using flowing water to create electricity.

7. Advantages of Alternative Energy
Sometimes using Alternative Energy produces less waste or pollution than burning fossil fuels.
Using Alternative Energy conserves or saves Earth’s resources.

8. Reflected Light
Light rays that are bounced off the surface of an object

9. Objects that reflect light
Dark shiny surfaces
Calm water
Mirrors
Shiny metalic surfaces

10. Refracted Light
The bending of light rays as they pass from one substance to another.

11. Objects that refract light
Water
Glass
Prisms
Curved mirrors
Camera lens