Across
- 1. produced by materials in the earth
- 7. instrument used to collect wind and water flow
- 9. energy that cannot be replaced
- 10. comes from things that were once living
Down
- 2. energy that can be easily replaced
- 3. the least amount of energy required for something to function
- 4. collects sun rays and converts them into electricity
- 5. free energy that produces no greenhouse gas
- 6. energy from flowing water
- 8. energy that comes from the sun