matter and density

123456789101112131415
Across
  1. 3. a measure of compactness
  2. 4. moles cula
  3. 8. the study of properties, matter and energy
  4. 10. this happens when metal heats up
  5. 11. the study of physics, chemistry, biology and earth
  6. 12. that which makes up a phisycal object
  7. 13. this happens when a liquid is heated
  8. 15. a large mass or quantity
Down
  1. 1. _______ are incompressable and are spread out with gravity
  2. 2. not a liquid or a gas but a s_______
  3. 5. this happens when a gas is cooled
  4. 6. sounds like maths
  5. 7. a substance which does not have a shape or form
  6. 9. this happens when metal cools
  7. 14. this makes things expand