Section 2.4

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Across
  1. 2. It is a chemical reaction that absorbs more energy than it releases.
  2. 5. It is the amount of energy that needs to be absorbed for a chemical reaction to start.
  3. 6. It changes substances into different substances by breaking and forming chemical bonds.
  4. 8. They are substances made by a chemical reaction.
Down
  1. 1. It is a chemical reaction that releases more energy than it absorbs.
  2. 3. It is reached when both the reactants and products are made at the same rate.
  3. 4. It is the amount of energy that will break a bond between two atoms.
  4. 7. They are substances changed during a chemical reaction.