science

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Across
  1. 3. female ruler
  2. 6. the combination of ideas to form a theory or system
  3. 8. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  4. 10. not alone
  5. 13. a multiplier or factor that measures some property
  6. 14. reacts
  7. 16. male ruler
  8. 17. things you buy
  9. 19. animal that digs in the ground
Down
  1. 1. the ability or tendency to float in water or air or some other fluid.
  2. 2. the distance from the top or surface to the bottom of something
  3. 4. liquid
  4. 5. decay
  5. 6. alone
  6. 7. (of a reaction or process) accompanied by or requiring the absorption of heat
  7. 9. best school ever
  8. 10. the quantity per unit volume, unit area, or unit length
  9. 11. a statement of the equality of two mathematical expressions
  10. 12. the thing you get on while skiing minus the word ski
  11. 15. (of a reaction or process) accompanied by the release of heat.
  12. 18. greatly impress or amuse