Matter, States of Matter, and Phase Changes

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Across
  1. 2. The negatively charged subatomic particle
  2. 3. Solid->Gas
  3. 4. Particles in this state are close together but can move past each other
  4. 5. A type of molecule that is made up of different types of atoms
  5. 12. The subatomic particle with no charge
  6. 13. When one state of matter changes into another state
  7. 14. Two or more atoms chemically combined
  8. 16. When thermal energy is removed, particles slow down and come closer together
  9. 17. Liquid->Gas
  10. 19. Solids, liquids, and gases are the three states of _____________.
  11. 20. Particles in this state are tightly packed and vibrating
  12. 21. Heat
Down
  1. 1. Gas->Solid
  2. 6. Solid->Liquid
  3. 7. When thermal energy is added, particles speed up and spread apart
  4. 8. Gas->Liquid
  5. 9. Liquid->Solid
  6. 10. Particles in this state move freely and have lots of kinetic energy
  7. 11. The measure of how hot or cold a substance is
  8. 13. The positively charged subatomic particle
  9. 15. The energy of motion
  10. 18. The "building block" of all matter