Science Vocab

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Across
  1. 7. a law that states a that matter can't be created or destroyed
  2. 11. on the right side of chemical reaction
Down
  1. 1. is one substance and changes to a different substance
  2. 2. atoms that electrons arranged in energy levels
  3. 3. gives off more energy than required
  4. 4. 2H2 +02 > 2H20
  5. 5. absorbs heat
  6. 6. speeds up a chemical equation
  7. 8. they slow down a chemical reaction
  8. 9. on the lefts side of a chemical equation
  9. 10. a biological substance