Across
- 3. also called crude oil, a liquid mixture of complex hydrocarbon compounds.
- 7. the energy received by the earth from the sun in the form of radiation
- 8. the fossil fuel most widely used for generating electrical power is a solid.
- 9. the process by which a nucleus splits into two or more fragments and releases neutrons and energy
- 10. the energy released by fission or fusion reaction
Down
- 1. electrical energy produced by the flow of water
- 2. the energy produced by heat within Earth
- 4. a mixture of gaseous hydrocarbons
- 5. a natural resource that humans use to generate energy
- 6. a nonrenewable energy resource formed from the remains of organisms that lived long ago