Across
- 6. Tiny forces that hold particles together
- 7. Energy source that comes from our nearest star
- 8. City in Ukraine that suffered a nuclear accident
- 11. Energy sources that are considered unlimited
- 12. Energy sources that will run out
- 13. Energy source made up of dead organisms
Down
- 1. Waste left behind by nuclear power plants
- 2. Energy when our planet expels heat to the surface
- 3. Power plant that utilizes flowing water
- 4. Energy source that consists of breaking bonds
- 5. Gas that traps heat at Earth's surface
- 9. The ability to do work
- 10. Construction used to harness power from flowing water