Across
- 4. a resource that can be replaced
- 7. something to help use wind as energy
- 8. any greasy, flammable liquid that doesn't mix with water
- 9. any materials that can be used as energy
- 10. an energy resource that uses air
Down
- 1. to change from one resource to another
- 2. a black brownish rock that can be used for nonrenewable energy
- 3. a type of energy made by electricity
- 5. a helpful way to do something
- 6. a resource that cannot be replaced