Chemical and Physical Reaction Crossword

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Across
  1. 4. Characteristics that can be observed or measured
  2. 5. Material that possesses physical properties
  3. 7. The substance which participates in chemical reaction
  4. 8. A set of levels or numbers which are used in particular system of measuring or comparing
Down
  1. 1. Reaction States on matter that stays the same
  2. 2. A representation of an ideas or object used to describe and explain
  3. 3. A substance that is presented at the end of a chemical reactions
  4. 6. The basic building block of chemistry
  5. 9. Reaction State of matter that changes