The Kilogram is the fundamental unit of mass in the International System of Units. Previously, when it was created, the kilogram was defined as being equivalent to the mass of one liter of demineralized water at a temperature of fifteen degrees Celsius. Later, this equivalence was abandoned, when it was realized, that the mass of the same amount of water varied according to its purity. Since most of the objects used by man in his day-to-day life are relatively larger than the gram, and since water does not have the same density in all his samples, a standard was required at the commercial level that could be reproduced and maintains its stability. Thus, the mass standard was defined as exactly equal to the mass of a small polished cylinder, fused in 1879 of platinum and iridium, maintained in France, a thousand times greater than the gram, the kilogram.
The Tonne is a unit of mass measurement used to describe large quantities. One ton of recycled paper saves about 22 trees. Known as the Great Pyramid or First Pyramid of Giza, this monument covers almost 53,000 square meters and its total weight has been valued at 5,273,834 tons. A wick with 100 strands of hair can handle 10 pounds, but the total hair on the head can withstand up to 12 tons!