About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 119. Chapters: Amorphous solids, Bone products, Crystalline solids, Solid fuels, Gunpowder, Tetrahydrocannabinol, Coal, Amber, Solid-fuel rocket, Asphalt, Obsidian, Caramel, Coke, Antler, Peat, Bitumen, Poly(methyl methacrylate), Amorphous silicon, Mineralized tissues, Wood fuel, Smokeless powder, Allotropes of sulfur, Biomass briquettes, Tektite, Charcoal, Wood pellet, Amorphous metal, Ammonium perchlorate composite propellant, Petroleum jelly, Firewood, Polyamorphism, Woodchips, Bagasse, Amorphous ice, Slag, Ground granulated blast furnace slag, Municipal solid waste, Cotton candy, Glassy carbon, Abietic acid, Bone char, Bioasphalt, Tusk, Sawdust, Neatsfoot oil, Hexamine fuel tablet, Artificial bone, Bone tool, Bone meal, Pitch, Amorphous carbonia, Dippel's oil, Tabua, Bioabsorbable metallic glass, Metglas, Parasporal body, Bone mineral, Sugar glass, Coke strength after reaction, Wood briquette, Bone crusher, Polycrase, Bone ash, Bone folder, Gymnite. Excerpt: Coal is a combustible black or brownish-black sedimentary rock normally occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, with smaller quantities of sulfur, oxygen and nitrogen. Coal begins as layers of plant matter accumulating at the bottom of a body of water. For the process to continue the plant matter must be protected from biodegradation and oxidization, usually by mud or acidic water. This trapped atmospheric carbon in the ground in immense peat bogs that eventually were covered over and deeply buried by sediments under which they metamorphosed into coal. Over time, the chemical and physical prop...
