Across
- 6. preventing wasteful use of a resource
- 7. hazardous by-product of nuclear power
- 8. energy in visible range of the electromagnetic spectrum
- 10. made from polymers (a petroleum product)
- 12. energy that uses gears, pulleys, and shafts…
- 13. long-term rise in Earth's temperature
Down
- 1. man-made fabric to imitate natural material
- 2. combines hydrogen to oxygen to create electricity
- 3. dead and decaying ancient living things
- 4. energy made of vibrations
- 5. CO2
- 7. solid mineral material forming earth’s crust
- 9. taking care of forests
- 11. energy in the bonds of molecules