Blank is the amount of space that a material takes up

Volume is the amount of space that a material takes up

Explanation:

The volume of an object can be determined the type of substance it is made of.

A solid wood placed on a table "retains its shape and volume", thus it is a solid.

A liquid when poured in the table will show varying results. The liquid may flow out of the table. This is because it does not retain its shape. The shape of a liquid depends on the container holding it. Thus, it has a "specific volume" and "irregular shape".

If an object is filled with air, for example, a balloon when filled with gas and a hole is placed the air rushes out of the balloon. This shows that air does not have a "definite shape nor volume".