phases of matter

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Across
  1. 4. matter in a state in which it will expand freely to fill the whole of a container
  2. 5. of matter a solid, a liquid, or a gas. We call this property of matter the phase of the matter.
  3. 7. a particle of matter that uniquely defines a chemical element
  4. 9. a group of atoms bonded together
  5. 10. matter that is not solid
Down
  1. 1. a minute portion of matter
  2. 2. the substance of which a physical object is composed
  3. 3. water to steam
  4. 6. firm and stable in shape; not liquid or fluid.
  5. 8. to become altered from a solid to a liquid state usually by heat.