Physical & Chemical Changes

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Across
  1. 3. a characteristic of chemical changes, meaning it cannot go back to its original form
  2. 5. a characteristic of physical changes, meaning they can be undone
  3. 6. the smallest unit of matter. found in the form of different elements.
  4. 9. a chemical change might _____ energy in the form of heat, light, or sound
  5. 11. when a gas loses enough energy to turn into a liquid
  6. 14. the type of change when a substance changes into something new. usually irreversible.
Down
  1. 1. many atoms of different elements combine to make these
  2. 2. the type of change when a substance alters its appearance without changing what it is made of
  3. 4. characteristics or ways to describe substances
  4. 7. when a liquid gains enough energy to turn into a gas
  5. 8. when a solid gains enough energy to turn into a liquid
  6. 10. what you end with in a reaction
  7. 12. when a liquid loses enough energy to turn into a solid
  8. 13. what you start with in a reaction