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