Across
- 2. energy obtained from water
- 4. layer of sun which we can see
- 9. process when nucleus breaks
- 11. source which cannot be renewed
- 12. extended layer
- 13. a type of crude oil
- 15. coal is extracted by what?
- 16. which gas is found more deeper than crude oil
- 17. stage when sun gets hotter and hotter
- 19. concreted tanks for biomass energy
- 21. energy inside the nucleus
Down
- 1. energy obtained from wind
- 2. person who made the law which is that the universe is expanding
- 3. thin layer
- 5. process when nuclei combines
- 6. a gas which is created when fossil fuels were burnt
- 7. energy of motion
- 8. zone which moves heat outwards
- 10. energy related to sun
- 14. stored energy
- 18. source which can be renewed
- 19. energy obtained from plant and animal waste
- 20. stage of explosion
- 22. what is found when mining is done?