That's a bit of a trick question! You can't say whether "density" itself sinks or floats. Density is a property of matter, not a thing in itself.

Here's how it works:

* Density is a measure of how much mass is packed into a given volume. Think of it like how tightly packed a box of stuff is.

* Water has a density of about 1 gram per cubic centimeter (g/cm³).

* Objects with a density *greater* than water will sink (like a rock).

* Objects with a density *less* than water will float (like a piece of wood).

So, the answer is: It depends on the density of the object you're comparing to water.