Across
- 3. naturally occurring yellowish-black liquid mixture of mainly hydrocarbons
- 8. Heat within the earth
- 9. Resources that can be replaced
- 10. energy from the sun that is converted into thermal or electrical energy
- 11. electrical energy obtained from harnessing the wind with windmills or wind turbines
- 12. fundamental entity of nature that is transferred between parts of a system in the production of physical change within the system and usually regarded as the capacity for doing work
- 13. renewable energy from plants and animals
Down
- 1. non-renewable resources that formed when prehistoric plants and animals died and were gradually buried by layers of rock
- 2. Resources that cannot be replaced
- 4. form of energy released from the nucleus, the core of atoms, made up of protons and neutrons
- 5. sedimentary deposit composed predominantly of carbon that is readily combustible
- 6. byproduct from nuclear reactors, fuel processing plants, hospitals and research facilities.
- 7. odorless, gaseous mixture of hydrocarbons—predominantly made up of methane (CH4)