Energy Crossword

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Across
  1. 2. Needed by humans for chemical energy.
  2. 3. Needed for tidal/wave energy.
  3. 5. Energy harvested from heat within the Earth.
  4. 6. Law of ______ of energy.
  5. 9. Source of energy that will not run out.
  6. 10. Clean, non-renewable gas.
  7. 11. Used to create nuclear energy.
  8. 12. Fuels derived from organic remains of prehistoric animals.
  9. 14. Energy utilised by 'tower of power'.
Down
  1. 1. Potential energy in planes.
  2. 2. More energy efficient than incandescent.
  3. 4. A gas harvested from biomass.
  4. 7. Large structures found on a wind farm.
  5. 8. Can never happen to energy.
  6. 13. Origin of all the worlds energy.