Natural gas, colourless highly flammable gaseous hydrocarbon consisting primarily of methane and ethane. It is a type of petroleum that commonly occurs…

Sintering, the welding together of small particles of metal by applying heat below the melting point. The process…

Synthetic diamond, man-made diamond that is usually produced by subjecting graphite to very high temperatures and pressures. Synthetic diamond resembles natural…

Fracture, in mineralogy, appearance of a surface broken in directions other than along cleavage planes. There…

Cleavage, tendency of a crystalline substance to split into fragments bounded by plane surfaces. Although cleavage surfaces…

Intelligent design (ID), argument intended to demonstrate that living organisms were created in more or…

Intermetallic compound, any of a class of substances composed of definite proportions of two or…

Silicon carbide, exceedingly hard, synthetically produced crystalline compound of silicon and carbon. Its chemical formula is SiC. Since the late…