* Mass: Mass is the amount of matter an object contains.
* Volume: Volume is the amount of space an object occupies.
* Density: Density is the ratio of mass to volume. A higher density means more mass packed into a smaller space.
Examples:
* Neutron stars: These are the collapsed cores of massive stars. They are incredibly dense, packing the mass of a star into a sphere only a few miles wide.
* Black holes: While not technically objects, they have immense mass concentrated into a point of singularity, essentially zero volume.
* Heavy metals: Elements like osmium and iridium have very high densities, meaning a small volume can hold a large mass.
Think of it like this:
Imagine a bowling ball (high mass, average volume) and a tiny pebble (low mass, very small volume). Now imagine packing all the matter of the bowling ball into the space of that tiny pebble. That's what happens with extremely dense objects. They have a lot of "stuff" crammed into a very small space.
