No, objects of larger mass do not always have more volume than smaller mass. Here's why:

* Density: The relationship between mass and volume is determined by density. Density is defined as mass per unit volume (Density = Mass / Volume).

* Different Materials: Different materials have different densities. For example:

* A kilogram of feathers will take up much more space (have a larger volume) than a kilogram of lead.

* A small, dense rock can have a higher mass than a large, fluffy pillow.

In summary: A larger mass can have a smaller volume if it is made of a denser material.