Across
- 4. Stops the flow of water
- 5. Heat from the Earth
- 6. Converts the Sun's energy into glucose
- 7. Nonrenewable, will run out
- 8. Energy made from water
- 10. Study of the interactions between living things and their environment
- 13. A living thing
- 14. Continuously replaced by nature
- 15. Eats other plants or animals for energy
Down
- 1. Light energy
- 2. Energy stored in plants or animals
- 3. Output divided by input
- 5. This kind of gas contributes to global warming
- 9. Recycles nutrients from dead organisms
- 11. Converts mechanical energy into electrical
- 12. The ability to do work