Science Fair Project Encyclopedia The gram or gramme, symbol g,
is a unit of mass, and is defined in the SI system of units as
one one-thousandth of a kilogram (i.e., 1x10-3 kg). The
kilogram, in turn, is defined as the mass of a specific
platinum-iridium cylinder maintained at the International Bureau
of Weights and Measures in Paris, France. Although the gram is
not an SI base unit, it is a derived unit of the kilogram, which
is a base unit. However, the gram is a base unit of the older
cgs system of measurement, a system which is no longer widely
used. Regardless, the gram is an essential measurement in
scientific endeavors worldwide. A gram was originally defined as
the weight of one cubic centimeter of water at its densest. This
occurs at a temperature near four degrees Celsius. However, its
definition was changed to the mass of a metal artifact in the
eighteenth century. The contents of this article is licensed
from www.wikipedia.org under the GNU Free Documentation License.
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