Across
- 6. materials or elements that can be used to produce energy
- 8. the radioactive element used to generate electrical energy in power plants
- 10. energy from below Earth's surface
- 11. power that is produced by moving water
- 12. Fuel that can be added to gasoline and is produced by biomass
- 13. The process of splitting the nuclei of atoms.
Down
- 1. the burning of fossil fuels causes these to be released in the the air
- 2. resources that are natural and cannot be replaced as quickly as they are used
- 3. This changes the kinetic energy of wind to electrical energy.
- 4. resources that can be replaced or are virtually limitless in supply
- 5. stored chemical energy in organic matter or wastes
- 7. anything that we use that comes from nature
- 9. the most important source of energy.