chapter 7 vocabulary

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Across
  1. 3. reaction is a process that leads to the chemical transformation of one set of chemical substances to another.
  2. 6. reactions release heat energy.
  3. 9. is the amount of substance present in a certain volume.
  4. 10. a substance that slows down a chemical reaction.
  5. 11. reactions absorb heat energy.
Down
  1. 1. of reaction tells how fast a reaction occurs after it has started.
  2. 2. is a substance that speeds up a chemical reaction.
  3. 3. equation tells chemist at a glance the reactants, products, physical sate, and the proportions of each substance present.
  4. 4. a substance that forms as a result of the reaction.
  5. 5. is the substance that exists before the reaction beings.
  6. 7. energy to start a chemical reaction you need this energy.
  7. 8. are large protein molecules that speed up reactions needed for your cells to work properly.