Physical Science

1234567891011
Across
  1. 3. an invisible and basic unit of matter
  2. 4. the only metal that is in liquid form at room temperature
  3. 7. the mechanical process to separate solids from the fluids
  4. 8. a positive ion
  5. 11. the process through which a substance changes from a solid to a liquid
Down
  1. 1. anything that has mass and occupies volume
  2. 2. NH3
  3. 5. the study of matter and the changes that happen
  4. 6. a strong base that dissolves in water
  5. 9. the center of an atom is called
  6. 10. it is defined as mass divided by volume