chemistry

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Across
  1. 3. animals breathe it out
  2. 4. found in water
  3. 8. used in car battery
  4. 9. gas used in lighter fluid
  5. 10. found in earths atmosphere
  6. 12. gas used in bright signage
  7. 13. acid found in citrus fruits
  8. 14. helps fruit ripen
  9. 15. used on cooking on a grill
  10. 17. its in pools
  11. 18. used to preserve specimens
  12. 19. produced by decomposing organic matter
Down
  1. 1. comes from volcanos
  2. 2. used in cleaning electronics
  3. 5. found in nail polish remover
  4. 6. found in fire extinguishers
  5. 7. gas from car exhaust
  6. 11. gas you breathe in
  7. 15. acid found in soft drinks
  8. 16. its in cleaner