Across
- 1. water
- 3. kerosene
- 8. photovoltaic
- 9. sun
- 10. oil
- 11. magnetism
- 13. energy
- 15. heat
- 18. gasoline
- 21. moon
- 22. motion
- 23. molecules
- 24. constant
- 27. uranium
- 28. earth
Down
- 2. renewable
- 4. kinetic
- 5. atoms
- 6. power
- 7. ocean
- 12. natural
- 14. plutonium
- 16. electricity
- 17. biomass
- 19. wind
- 20. solar
- 25. organic
- 26. sediment