science vocab

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Across
  1. 2. chemical reaction in which one reactant yields two or more product
  2. 3. produces heat
  3. 6. one element is replaced by another in a compound
  4. 8. a substance that enters into and is altered in the course of a chemical reaction.
Down
  1. 1. reaction that occurs when two reactants exchange cations or anions to yield two new products
  2. 4. draws in heat
  3. 5. two or more chemical species combine to form a more complex product
  4. 7. substance that is formed as the result of a chemical reaction