Matter

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Across
  1. 1. temperature and pressure at which a liquid becomes a gas
  2. 3. has definite chemical and physical properties
  3. 5. change into new substance with new properties
  4. 8. cannot be broken down into simpler substances by chemical means
  5. 9. smallest unit of an element
Down
  1. 2. change of matter from one form to another without a change in chemical properties
  2. 4. combination of substances not chemically combined
  3. 5. made of two or more elements held together by chemical bonds
  4. 6. temperature an pressure at which a solid becomes a liquid
  5. 7. ratio mass and volume of a substance