Physical & Chemical Changes

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Across
  1. 2. new substances that are formed
  2. 3. the process by which zinc on iron to prevent rusting
  3. 5. substances participating in a chemical reaction
  4. 7. the appearance of what is confirmed as evolution of gas
Down
  1. 1. salt or alum form substances in water by a process
  2. 4. cubic structures of sugar
  3. 6. what is released during exothermic reactions