Across
- 2. natural underground pressure pushes oil to the surface
- 4. an unstable atom (fuel for a nuclear reactor)
- 5. energy stored in chemical bonds between atoms and molecules
- 7. used when coal deposits are deep underground
- 9. commonly used process for converting stored chemical energy
- 11. energy of an object due to its position or shape
- 12. energy required to move/change an objects position
- 13. used when coal deposits are near the surface
- 15. initial pressure diminishes so water of gas is pumped through to push out the oil
- 16. These are resources which can never be replaced, or are replaced too slowly
- 19. another name for hydraulic fracturing
- 20. is considered the worst man-made ecological disaster
- 21. the ability to do work
Down
- 1. the cleanest burning fossil fuel
- 2. formed from the compression of dead plant material
- 3. energy stored in forces holding atomic nuclei together
- 6. the energy of motion
- 8. where a large nucleus is broken, two small isotopes of hydrogen fuse to form helium
- 10. energy emitted in the form of waves
- 14. generally readily available, and are replaced quickly or continually.
- 17. energy associated with the movement/flow of electrons
- 18. energy of the movement of molecules