Reviewing states of matter

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Across
  1. 2. A process that reduces the volume of a gas by applying pressure.
  2. 5. A small portion of matter, like atoms or molecules.
  3. 8. The process in which liquid turns into gas at the surface.
  4. 9. A process where matter increases in volume, especially when heated.
  5. 10. A property that relates mass to volume; mass per unit volume.
  6. 11. A state of matter that has neither fixed shape nor fixed volume.
  7. 12. A state of matter with a fixed shape and volume.
  8. 14. A state of matter with a fixed volume but no fixed shape.
Down
  1. 1. A group of atoms bonded together, the smallest unit of a chemical compound.
  2. 3. An ionized state of matter found in stars and lightning.
  3. 4. The ability of an object to float in a fluid due to differences in density.
  4. 6. The process in which a liquid turns into a solid.
  5. 7. The process in which a gas turns into a liquid.
  6. 13. The process by which a liquid turns into a gas.