Science Crossword

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Across
  1. 1. change change that only affects the physical properties
  2. 4. substance formed as a result of a reaction
  3. 6. a multiplier or factor that measures some property
  4. 8. a solid transforms inside another solid
  5. 12. small numbers written to the right of the atoms; tells the number of atoms in each element in each compound
  6. 14. ________ of conservation of mass states that the mass of the products of a chemical reaction must be the same as the mass of the reactants in that reaction
  7. 15. replacement reaction occurs when one element replaces another one in a compound
Down
  1. 2. a white solid
  2. 3. CO3
  3. 5. reaction compounds break down into simpler substances
  4. 7. reaction two or more elements that combine to make a more complex substance
  5. 9. substances that exist before the reaction begins
  6. 10. O2
  7. 11. replacement reaction occurs when different atoms in two different compounds trade places
  8. 13. reaction a proces that produces a chemical change