States of Matter

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Across
  1. 1. No forces so the particles move very fast and spread out to fill the whole container
  2. 4. When particles change state from a solid to a liquid
  3. 5. Amount of space a substance occupies
  4. 7. Amount of matter in an object or substance
  5. 9. What substances and objects are made of
  6. 12. When particles change state from a gas to a liquid
  7. 13. Weak forces hold the particles together so they roll over each other and take the shape of the container
Down
  1. 2. When particles change state from a solid directly to a gas
  2. 3. When particles change state from a liquid to a solid
  3. 6. When particles change state from a liquid to a gas
  4. 8. Particles that form the building blocks of matter
  5. 10. Strong forces hold the particles close together in a fixed shape
  6. 11. Mass of a fixed volume of matter