Chapter Five Vocabulary Quiz- Hayly Smith

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Across
  1. 5. A reaction when an element replaces another in a chemical equation
  2. 6. Any change that alternate appearance of another substance
  3. 10. A number place in from of an element in a chemical equation
  4. 11. the minimum amount of energy needed to start a chemical reaction
  5. 13. A change in matter that changes into one or more new substances
  6. 14. A reaction when two or more elements or compounds combine into more complex equations
  7. 15. The energy released
  8. 16. A material used to decrease the rate of a chemical reaction
  9. 17. Matter cannot enter or leave
  10. 18. The cells in your body that contain thousands of catalysts
Down
  1. 1. In creases the reaction rate by lowering the activation energy needed
  2. 2. Solids that form from liquids during a chemical change
  3. 3. Where matter can enter and leave into the surrounding areas
  4. 4. The new substances that form during a chemical change
  5. 7. The amount of substance in a given volume
  6. 8. The energy gained
  7. 9. Substances that undergo chemical changes
  8. 12. A reaction when two or more elements break down less complex equations