Specific gravity
- the ratio
of the density of a substance to the density of another substance accepted
as a standard
- The usual
standard for liquids & solids is water
- eg a
liquid with a specific gravity of 4 is 4 x more dense than water
- Hydrogen
is the usual standard for gases
- Density: the amount of mass of a substance
in a given volume. The greater the mass in a given volume, the greater the
density