Crossword

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Across
  1. 2. energy that never runs out
  2. 6. energy that can only be used once
  3. 7. hydroelectric energy is produced in this
  4. 9. energy that is produced by moving water
  5. 10. wind spins this and produces energy
Down
  1. 1. this makes solar energy
  2. 3. organic matter used as a fuel
  3. 4. term for producing energy efficiently
  4. 5. energy that is produced by the sun
  5. 8. a turbine produces this type of energy