Across
- 2. the liquid form of fossil fuels.
- 5. a dam that keeps the water in a certain spot to keep it from overflowing.
- 8. energy provided by the heat of the earth.
- 11. a very long period of time
- 12. a resource that cannot be renewed in a lifetime
- 14. the matter that is layered on top of fossil fuels
- 15. the solid form of fossil fuel.
Down
- 1. energy provided by the sun.
- 3. the power that is provided by moving water.
- 4. the gas form of fossil fuels.
- 6. panels that absorb the energy provided by the sun.
- 7. the mass of organisms in a certain place.
- 9. a resource that can be renewed in a lifetime
- 10. a tool used for wind energy
- 13. a renewable resource powered by windmills.