1. Mass: The mass of an object is a measure of its resistance to acceleration. The greater the mass of an object, the more force it takes to accelerate it.

2. Volume: The volume of an object is a measure of the amount of space it occupies. The greater the volume of an object, the more space it takes up.

3. Surface area: The surface area of an object is a measure of the amount of surface it has. The greater the surface area of an object, the more surface it has to interact with its surroundings.