Is density dependent on the size of the object or is it a property of the material? explain.?

Question

pleaseeeee help:( im lost

Answer 1

a chunk of a truck tire and a chunk of a rubber sponge,  both made exactly the same size.

The piece of the truck tire has more density, no room for air bubbles or to let water in.  It has higher density rubber than the piece sponge of the same size which is half rubber and half empty spaces.  You could pour water right through the low density object.  They are both the same size, and even made of the same materials, but one is made with higher density (tire) and the other is made lower density (sponge).

Another way to think of "density" is the thickness (but not the size)  of the substance that object is made of.

It is  the property of the material, not the size of the object.

Answer 2

density is mass/volume, so it is a property of the material. If iron has a certain density, that does not change when there is more iron, such as double the amount, because if you double the volume, you will have doubled the mass as well, leaving mass/volume the same.