As humans, we get by with five senses: touch, taste, sight, smell, and hearing. They work well for us, but other animals have developed many other strange and wonderful ways to find their way…
Earth is not perfectly round; it bulges at the equator and is flatter at the poles. From space the planet looks blue with white swirls, created by water and clouds.Size: Four planets in our solar…
Why are some foods kosher and others not? by Michael Morrison Passover Dates (from sundown to sundown of the following dates) 2014 — April 14–22 2015 —…
(Encyclopedia) attar of rosesattar of rosesătˈər, ăˈtär [key], or rose oil, fragrant essential oil obtained from roses and used in making perfume. It is one of the most valuable of the volatile oils…
(Encyclopedia) ferrous sulfate or iron (II) sulfate, chemical compound, FeSO4. It is known as the monohydrate, FeSO4·H2O; the tetrahydrate, FeSO4·4H2O; the pentahydrate, FeSO4·5H2O; and the…
(Encyclopedia) Frankland, Sir Edward, 1825–99, English chemist. He studied under Bunsen and Liebig and taught at several English institutions. In working on the synthesis and isolation of compounds…
(Encyclopedia) molar volume, the volume occupied by a mole of a substance at STP. According to Avogadro's law, at a given temperature and pressure a given volume of any gas contains the same number…
(Encyclopedia) catchment area or drainage basin, area drained by a stream or other body of water. The limits of a given catchment area are the heights of land—often called drainage divides, or…
(Encyclopedia) carbide, any one of a group of compounds that contain carbon and one other element that is either a metal, boron, or silicon. Generally, a carbide is prepared by heating a metal, metal…
(Encyclopedia) sublimationsublimationsŭblĭmāˈshən [key], change of a solid substance directly to a vapor without first passing through the liquid state. The term is also used to describe the reverse…
