States of matter vocabulary

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Across
  1. 7. A liquid gains enough heat energy to turn into a gas
  2. 8. The space that something takes up
  3. 9. A tiny piece of matter that we cannot see with our eyes
  4. 11. To shake or move slightly
  5. 13. A solid gains enough heat energy to turn into a liquid
  6. 14. The particles in a ______ a close together but do not have a fixed shape
  7. 15. The particles in a ______ are spaced out and always moving. They can be compressed.
Down
  1. 1. A gas loses heat energy and turns into a liquid
  2. 2. To spread out and take up more space
  3. 3. A liquid loses so much heat energy that it turns to a solid
  4. 4. Matter is anything that has weight and takes up space
  5. 5. To squash something into a smaller space
  6. 6. The parts of something move closer together and take up less space
  7. 10. ______ have a fixed shape and fixed volume
  8. 12. A liquid gains so much heat energy that it turns to a gas