Reviewed and added to the discussion regarding falling bodies and their mass. We extended the concept to demonstrate that there are factors which will affect the rate of fall. A demonstration of an index card left whole and one which was folded in fourth's, both dropped together, with the folded card reaching the ground first. This demonstrated that even though the mass was equal, the shape had an effect on how the air molecules held up the unfolded card. The basic SI units were listed for length, mass, time, temperature and amount of substance, along with their symbols. The derived units were shown like joules and coulombs to be combinations of the basic units. The commonly used prefixes were listed. Some problems were worked using basic formulas and derived units.