Chapter 7 vocab.

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Across
  1. 2. releases heat energy.
  2. 5. absorbs heat energy.
  3. 6. the amount of substance presents in a certain volume.
  4. 10. substance that speeds up a chemical reaction.
  5. 11. tells how fast a reaction occurs after it has started.
Down
  1. 1. the energy that starts a chemical reaction.
  2. 3. the substance that slows down a chemical reaction.
  3. 4. part of the equation on the right side.
  4. 6. shows the reactants, products, physical state, and the extra stuff of each substance.
  5. 7. is the process that makes a chemical change.
  6. 8. part of the equation on the left side.
  7. 9. large protein molecules that speed up a reaction needed for the cells to work correctly.