Chemical Reactions

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Across
  1. 2. We see bubbles of these in a chemical reaction.
  2. 4. Another word for changes back.
  3. 6. When a precipitate forms it is a sign of what change?
Down
  1. 1. Ice melting to water is a ________ change.
  2. 3. In a chemical reaction, a new _______ is always produced.
  3. 5. In a chemical reaction, light ______ and heat ______ can be produced.