Across
- 3. the breaking up of a neutron into small nuclei that are formed into energy atoms
- 5. the making of small nuclei into an energy neutron
- 9. a substance that provides energy such as heat, light, motion or electricity
- 11. the original source of the energy in wind and flowing water that comes from the sun
- 12. another name for oil
- 15. a change that happens when gas in a car's engine is burned
- 18. fuels that are made from living things
- 19. the producing of electricity by combining hydrogen and oxygen fuel cells.
- 22. the main use for coal
- 24. the central core of an atom that contains protons and neutrons
- 25. a form of one energy to another
- 27. energy-rich substances formed from the remains of organisms
- 28. rods that are used to slow down the chain reaction in a reactor vessel
- 29. the reactor that contains rods of U-235
- 30. layer of material that traps air to help block the transfer of heat between air inside and outside a building
Down
- 1. the process when fuel rods generate so much heat that they start to melt
- 2. compounds that are made of oil
- 4. wood, plant parts, manure and food wastes that can be used as fossil fuels
- 6. heat from the Earth's interior layers
- 7. the energy that is formed from the interior heat from Earth's magma
- 8. when fuels are burnt so that the chemical energy is released to form another form of energy
- 10. to reduce the amount of energy use
- 13. a vessel where uranium fuel undergoes nuclear fission producing heat
- 14. electricity produced form flowing water
- 16. the mixture of alcohol and gasoline
- 17. the percentage of energy that is performed to do work
- 20. chemical compounds that contain carbon and hydrogen atoms
- 21. a place where stem is turned to generate electricity
- 23. the main use for oil
- 26. a factory in which crude oil is heated and separated into fuels and other products