Across
- 5. an energy rich substance
- 6. coming together
- 11. a resource that is always available or can naturally be replaced in a short time
- 13. intense heat from earth interior that’s warms the magma
- 15. a renewable resource
- 17. part of the nuclear reactor where nuclear fission occurs
- 20. compounds made from oil
- 22. electricity produced by flowing water
- 24. energy from the sun
- 26. a solid fossil fuel formed from plant remains
- 27. active solar cells
- 28. breaking apart
Down
- 1. a machine with turbines used to generate electricity
- 2. the central core of an atom that contains protons and neutrons
- 3. the process of burning fuels
- 4. a natural resource that is not replaced in a useful amount of time
- 7. gas that comes naturally from the ground
- 8. the most used thing for electricity production
- 9. a substance that provides energy
- 10. the percentage of energy that is used to perform work
- 12. one form of energy to another
- 14. chemical compounds that contain carbon and hydrogen atoms
- 16. a factory in which crude oil must undergo a process
- 18. fuel made from living things
- 19. adding alcohol to gasoline
- 21. reducing energy use
- 23. a rod used in a nuclear reactor to absorb neutrons
- 25. a layer of heating and cooling systems