Specific gravity I think. Start there.
The international (SI) unit of mass is the kilogram.
Usually to measure mass, one uses grams or kilograms.
The same unit as you use to measure any mass. The SI unit for mass is the kilogram.
Grams are one unit in which weight can be measured.
The standard unit to measure mass is kilograms.
milligrams
Strawberries would be measured in grams or ounces.
The official SI unit for mass is the kilogram.
You would use the unit of measure called "kilograms" to measure the mass of an elephant.
The SI unit of the gram is the measure of mass. It is the basis for the units that measure force (Newton) and work (Joule).
Mass is a measure of the amount of matter in an object. The SI unit is a kilogram.
Gram IS the unit in this case. Gram is a unit for measuring mass. The international unit for mass is the kilogram; thus, one gram is 1/1000 of a kilogram.