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Across
  1. 5. when a liquid turns into a gas
  2. 7. a measure of how much space something takes up
  3. 9. a word to describe something that can be seen with the unaided eye
  4. 10. macroscopic a word to describe something that can NOT be seen with the unaided eye
  5. 12. the transfer of thermal energy
  6. 16. the simplest substances made up of one type of atom
  7. 18. the process when a gas turns into a liquid
Down
  1. 1. when a solid turns directly into a gas
  2. 2. matter with a definite shape and volume
  3. 3. a combination of two or more atoms
  4. 4. a measure of the average speed of particles
  5. 6. a type of energy that describes the motion of particles in a substance
  6. 8. matter that does not have a definite volume or shape
  7. 10. anything that has volume and mass
  8. 11. a word for both atoms and molecules
  9. 13. ____ point, the temperature when a liquid turns to a gas
  10. 14. ____ point, the temperature when a solid turns to a liquid
  11. 15. matter with a definite volume but not a definite shape
  12. 17. the amount of "stuff" something has
  13. 19. the basic building block of matter