Matter

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Across
  1. 2. The starting material of a chemical reaction
  2. 3. A change in a material that is not irreversible, the material can go back to its original (or at least almost) form
  3. 5. A state of matter that has a definite volume, but no definite shape
  4. 7. The minimum amount of energy needed to have a material have a chemical reaction
  5. 8. A change in a material that is usually irreversible
  6. 9. A system that allows some substances to escape
  7. 11. A system that doesn't allow any substances to escape
  8. 12. The end result material of a chemical reaction
Down
  1. 1. The principle that states that matter cannot be created or destroyed in any physical or chemical change
  2. 4. A state of matter that has no definite volume or shape
  3. 6. Anything that has mass and takes up space
  4. 10. A state of matter that has a definite shape and definite volume