Caesar salad crossword

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Across
  1. 4. A substance that is ___ can melt through materials like skin
  2. 5. opposite of an alkali, pH 0-6
  3. 7. a fossil fuel formed from remains of trees and plants
  4. 8. renewable energy from the sun (___ power)
  5. 9. not acid or alkali, pH 7
  6. 10. what the habitat is like
  7. 13. all populations of organisms in a habitat
  8. 15. energy that will not run out
  9. 17. foods that contain weak acids often taste ___
  10. 18. foods that contain weak alkalis often taste ___
Down
  1. 1. renewable energy from water in a dam turning turbines (___ power)
  2. 2. non renewable fuels made over millions of years
  3. 3. all members of a species in a habitat
  4. 5. changing to fit the
  5. 6. place where an organism lives
  6. 11. + natural gas fuels formed from remains of sea life (___ + ___)
  7. 12. non renewable energy released from ___ reactions
  8. 14. opposite of an acid, pH 8-14
  9. 16. all communities + habitat