Faris' Crossword pussle

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Across
  1. 3. The thing that is produced when two or more substances are combined
  2. 6. A change in an object without changing it's chemical composition
  3. 10. A characteristic of an object that is measurable
  4. 11. A substance that increases the rate of a chemical reaction
  5. 12. The amount of space an object takes up
  6. 14. The ability of molecules to stay together
  7. 15. Forces that hold atoms together
  8. 16. The amount of matter in an object
  9. 17. An object that takes in heat
Down
  1. 1. A characteristic of an object that is not measurable
  2. 2. An object that puts out heat
  3. 4. When two substances combine to create a new one
  4. 5. The smallest units of matter
  5. 7. The amount of energy movement between two objects
  6. 8. When two or more different elements combine that's pure
  7. 9. Different types of atoms
  8. 10. The scientific study of the properties and behavior of matter.
  9. 13. The substances that combine to create a new substance
  10. 18. A combination of substances