2. one gallon is ________ml.

3. The maximum volume of the liquid that container can hold is called ____________.

4. _______________ is the commonly used unit to measure the volume of liquids.

5. 1 _____________ = 30 ml

6. The Si unit of density is _______

7. Density of castor oil is ______________

8. 1 AU is equal to _________m

9. The materials with higher density are called ____________ materials.

10. 1 light year is equal to ____________m