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".

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.