Changes in matter vocabulary

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Across
  1. 4. noting or pertaining to a chemical change
  2. 9. very small particle
  3. 11. A substance that starts or speeds up a chemical reaction
  4. 13. the measurement of matter
  5. 15. A ... happens when you mix chemicals together
  6. 16. reactions of the chemical elements and the compounds they form
  7. 17. A composition of two or more substances that are not chemically combined
  8. 20. A substance consisting of atoms or ions of two or more different elements
Down
  1. 1. A number or quantity obtained by multiplication
  2. 2. transfer heat energy to another physical system
  3. 3. A force of attraction that holds atoms or ions together in a molecule or crystal
  4. 5. a chemical reaction that absorbs heat
  5. 6. The force of attraction that holds molecules
  6. 7. Internal energy that is transferred to a physical system from outside the system
  7. 8. A substance participating in a chemical reaction
  8. 10. solid, liquid, or gas
  9. 12. combinations of neutrons and protons
  10. 14. ... lets you have power
  11. 18. A substance that cannot be broken down into simpler substances by chemical
  12. 19. The amount of space occupied by a three-dimensional object or region of space