Across
- 5. energy fossil fuels: coal, petroleum, and natural gas
- 7. replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.
- 10. underground water
- 11. the conversion of a vapor or gas to a liquid
- 12. scientists who study organisms
Down
- 1. the cycling of water
- 2. sun energy
- 3. black rock found mainly in underground seams and used as fuel
- 4. rain, snow, sleet, or hail
- 6. evaporation from plants and animals
- 8. the water or other material that drains freely off the surface of something
- 9. The process of turning from a liquid into vapor