Science

Myelin Definition Myelin is a whitish, fatty substance that forms a sheath around many vertebrate nerve fibers. Myelin insulates the nerves and permits the rapid…

Silicon Carbide Definition Silicon carbide (SiC) is an extremely hard bluish-black insoluble crystalline substance produced by heating carbon with sand at a high temperature and…

Magic Acid Definition Magic acid is a superacid consisting of a mixture, most commonly in a 1:1 molar ratio, of fluorosulfuric acid (HSO3F) and antimony…

Neuroglia Definition Neuroglia is the delicate connective tissue which supports and binds together the nervous elements of the central nervous system. One part of it,…

Germanium Definition Germanium is a brittle, crystalline, grayish-white metalloid element that is found in coal, in zinc ores, and in several minerals. Its atomic number…

Adding Fractions with Different Denominators A very difficult area for many people is fractions, especially when you begin adding. This can become even more complex…

Ependyma Definition Ependyma is the membrane lining the ventricles of the brain and the central canal of the spinal cord. It is one of the…

Silicon Definition Silicon is a metalloid element that occurs in both gray crystalline and brown noncrystalline forms. It is the second most abundant element in…

Ventricular System Definition Ventricular system is comprised of a series of four cavities in the brain that produce cerebrospinal fluid (CSF). It is a series…

Fluoroantimonic Acid Definition Fluoroantimonic acid is considered the strongest liquid superacid, and depending on who we talk to, may be considered the strongest superacid. It…

About Brass Definition Brass is a yellowish alloy of copper and zinc, usually 67 percent copper and 33 percent zinc. It sometimes includes small amounts…

Addition equations with four digit integers An equation is a mathematical statement that has an expression on the left side of the equals sign (=)…