Mass - Mass is often associated with weight which is the force resulting from the acceleration due to gravity acting on the mass. For example a one gram weight is the force resulting from the acceleration due to gravity (i.e.,981 cm per second²) acting on a mass of 1 gram (i.e. 981 dynes). Masses, however, can be compared by comparing their weights as, at any point on the earths surface the gravitational acceleration will be the same on both.

Further Information on this Topic can be found in the books of R.P.W. Scott by following the listed links