Matter Crossword puzzle

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Across
  1. 2. a group of atoms that are held together by chemical force
  2. 5. describes something that has a uniform structure or composition throughout
  3. 7. the change of state from a liquid to a gas that usually occurs at the surface of a liquid over a wide range of temperatures
  4. 8. a combination of two or more substances that are not chemically combined
  5. 9. the change of state from a liquid to a solid
  6. 10. a form of matter that does not have a defined volume or shape
  7. 14. a substance that cannot be separated or broken down into similar substances by chemical means
  8. 15. a subatomic particle that has no charge and that is located in the nucleus of an atom
  9. 16. the change from state from a liquid to a gas that occurs at a specific temperature
Down
  1. 1. a substance made up of atoms of two or more different elements joined by chemical bonds
  2. 3. that state of matter in which the volume and shape of a substance are fixed
  3. 4. the change of state from solid directly to a gas
  4. 6. describes something that doesn't have a uniform structure or composition
  5. 11. the change of state from a gas to a liquid
  6. 12. the state of matter that has a definite volume but not a definite volume but not a definite shape
  7. 13. the process in which material is laid down