The answer may just depend on what points B and C represent, don't you think?
The answer depends on where points b and c are!
at point A
the heat makes the density less or more dence depending were it is in the earths layers
the density will be greater at point B because my mommy says
It depends on the material and the location of points a and b.
A relation between the boiling point and density doesn't exist.
Because density is an intensive property, it does not depend on the amount of material. Density is a ratio between mass and volume, D=M/V. That specific ratio is constant for any material. For example, the smallest sample of aluminum and the largest sample of aluminum have a density of 2.70 g/cm^3 at room temperature. Density does change with temperature because temperature affects volume. The density of all samples of aluminum at its melting point is 2.375 g/cm^3.https://en.wikipedia.org/wiki/Aluminium
boiling point increases
Both temperatures are the same.
Pressure and temperature. Increasing the pressure increases the density. Increasing the temperature decreases the density between melting point and 4oC
A physical property of a material is an intrinsic characteristic of this material; examples: density, hardness, refractive index, boiling point etc. This not depends on the material mass. The physical quantity is a measure of the property; examples: g/cm3, volt, pascal, coulomb etc.
I was also looking for the answer to this question. I decided to see what Wikipedia had to say about it, and found this: http://en.wikipedia.org/wiki/Absorbance This article kinda explains how they are related. Good luck!