Energy Crossword

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Across
  1. 2. essential and fundamental
  2. 4. existing inside something or someone
  3. 5. something you can choose to have or do instead of something else
  4. 8. to think something up or to invent something
  5. 9. attended by or causing suffering great damage loss or destruction
  6. 10. to contaminate or make dirty or impure
  7. 11. something that is equal in force amount area or value
  8. 12. very complicated
  9. 13. to produce something
Down
  1. 1. a dwelling place the act of making a place one's home
  2. 3. dangerous or risky
  3. 5. to make something louder or stronger
  4. 6. an action in response to something the result of mixing chemicals or changing the nucleus of an atom
  5. 7. all the living and nonliving things surrounding a plant or animal in the place where it loves or grows
  6. 11. able to work well and not waste time or energy