Density

Sinking of objects depend on how big the object is.

If the molecules are far away from each other, the objects are less dense or less solid

Large objects always sink.

Floating of objects depend on how small the object is.

Floating and sinking of objects depend on how heavy the objects are.

Density is mass divided by volume.

What do we call the relation between mass and volume?

What determines if an object will float or sink?

When the object is less dense than water, it sinks.