Energy

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Across
  1. 3. the energy released during nuclear fission or fusion.
  2. 5. quantities of oil and gas that are already discovered.
  3. 7. liquid found beneath the earth's surface.
  4. 8. a renewable material that comes from plants and animals.
  5. 9. the use of less energy to perform the same task or produce the same result.
Down
  1. 1. the decision and practice of using less energy.
  2. 2. energy from a source that is not depleted when used.
  3. 4. a device that converts motion-based power.
  4. 6. a cell-producing an electric current directly from a chemical reaction.
  5. 10. a natural fuel such as coal or gas.