Matter

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Across
  1. 5. a particle consisting of two or more atoms covalently bonded together
  2. 6. anything that has mass and takes up space
  3. 7. the building block of all matter consisting of protons, electrons and neutrons
  4. 9. the mass per unit volume of an object
Down
  1. 1. is very workable as it explains most of our observations about matter
  2. 2. law that states that the masses of chemical substances combine in definite characteristic integer ratios when forming compounds
  3. 3. the space enclosed or occupied by an object
  4. 4. the force of gravity acting on the matter in an object
  5. 8. the measure of the amount of matter in an object