| Aluminum is a useful and abundant
metal which comes from bauxite. Bauxite is an ore that looks like clay,
and contains several other substances. workmen extract these other substances
from bauxite by putting it in pressurized tanks which grind it. The
other substances form a mass which is removed by using filters, and a liquid
remains in the tank. Using several other processes, it finally yields a
white, powdery, chemical called alumina. Alumina is a mixture that contains
aluminum and oxygen. The oxygen and aluminum are separated by using electricity.
A light, bright, and silvery metal is finally produced. This metal comes
in many forms. |