Matter - What's a Matter with you?

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Across
  1. 2. When a solid turns into a gas.
  2. 6. When a liquid turns into a gas.
  3. 8. When a gas turns into a solid.
  4. 10. The smallest unit of matter.
  5. 11. Anything with mass and volume.
  6. 12. When liquid turns into a solid.
  7. 13. When a solid turns into a liquid.
Down
  1. 1. / Particles are loosely packed and move around slowly. It takes the shape of the container it is in.
  2. 3. When a gas turns into a liquid.
  3. 4. How much matter is in an object.
  4. 5. / Particles are packed closely together and can only vibrate in one spot. It holds its own shape.
  5. 7. How much space an object takes.
  6. 9. / Particles have a lot of energy and move around freely, taking up the space they are in.
  7. 11. A group of atoms bonded together.