Chapter 2 Vocabulary

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Across
  1. 6. a short way to show a chemcal reaction
  2. 7. the reaction of two elements
  3. 11. when matter can enter or leave
  4. 12. a material that increase the rate of a reaction
  5. 14. the result of the combined reaction
  6. 16. a number placed in front of the chemical
  7. 17. a material that increase the rate of burning.
  8. 18. when one element replaces another
  9. 22. a principle that provides an explanation of what happens when reactants combine
  10. 23. a solid that forms from a chemical solution
  11. 24. the minimum amount of energy needed to start a chemical reaction.
  12. 25. the amount a substance is given to fill a certain volume.
Down
  1. 1. a property that can be observed through telescopes but not touched
  2. 2. the study of matter
  3. 3. the substance you test with at the beginning
  4. 4. a property that can be observed and touches
  5. 5. a rapid reaction between 2 elements
  6. 8. when energy is released
  7. 9. when matter is not allowed to enter or leave.
  8. 10. changes that require microscopes
  9. 13. when energy is absorbed
  10. 15. when elements break down
  11. 19. an object used to decrease the rate of reaction
  12. 20. changes that can be observed physically
  13. 21. anything that takes up space