The Particle Theory

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Across
  1. 3. Something that has never been seen by anyone
  2. 8. The smallest part of an element
  3. 10. The temperature where all particles stop
  4. 12. a unit that is used to measure volume
  5. 16. Name of the process where gases turn into solids
  6. 18. Small particles that flows around a circuit
Down
  1. 1. When particles spread and mix with each other without anything moving them
  2. 2. Something that is known as the 4th state of matter
  3. 4. Particles are close together
  4. 5. A description of how a material behaves and what it is like
  5. 6. What makes a solid turn into liquid
  6. 7. Something that solids can't do
  7. 9. The three different forms that a substance can be in
  8. 11. Something that is heavy for its volume
  9. 13. A way of explaining why things happen as they do
  10. 14. Particles could be squashed
  11. 15. The amount of room something take up
  12. 17. The forces that keeps the particles close together
  13. 19. They could flow but can't change its volume