Their densities, temperatures, and locations are different.
less dense than the solid material around it
All substances are dense. The density of some substances is greater than that of others. For example, the density of the earth's core material is greater than the density of the vacuum around Pluto. I think you're fishing for Osmium.
false
Yes.
It is slightly more dense.
Well one of them is kind of dense while the other one is not really dense at all.
lead is more dense
Polystyrene is a plastic that can be made into many products, which can be dense, or can be in the form of a low density foam, called Styrofoam.
Linear Density refers to the mass per unit length of a one-dimensional object (e.g. guitar strings) while density refers to any object and indicates how dense or solid something is.
less dense than the solid material around it
The density of the inner core is estimated to be between 12.8 -13.1 g/cm3, the most dense Earth layer.
A less dense object or any other substance will float on a more dense liquid.
A less dense object or any other substance will float on a more dense liquid.
Heterogeneous refers to a difference in some quantity between parts. If different ribs are said to have heterogeneous bone density, some of the ribs are more or less dense than others.
The more dense a substance is, the more viscous it is.
Density, in terms of matters indicate the mass per unit volume, for example oil will be more dense than water. For electronics high density indicates more closely packed with components. For example a high density board will have many more components than a simple circuit board.
The difference in water density (hot-cold) is very small, compared to the difference in density between water of any temperature, and your body. That is, even hot water is more dense that we are, so we still float.