(Encyclopedia) varnish, homogeneous solution of gum or of natural or synthetic resins in oil (oil varnish) or in a volatile solvent (spirit varnish), which dries on exposure to air, forming a thin,…
(Encyclopedia) osmosisosmosisŏzmōˈsĭs [key], transfer of a liquid solvent through a semipermeable membrane that does not allow dissolved solids (solutes) to pass. Osmosis refers only to transfer of…
chemist, Nobel laureateBorn: March 19, 1943Birthplace: Mexico City At the University of California at Berkeley in 1973, Molina and Sherwood Rowland began researching chlorofluorocarbons (CFCs),…
chemist, Nobel laureateBorn: June 28, 1927Birthplace: Delaware, Ohio Roland's early work was on the chemistry of radioactive atoms. Branching out, in 1973, he and Mario Molina began researching…
Source: The Environmental Protection AgencyI. The Ozone Layer The Earth's atmosphere is divided into several layers. The lowest region, the troposphere, extends from the Earth's surface up to about…
(Encyclopedia) Beer's law [for August Beer], physical law stating that the quantity of light absorbed by a substance dissolved in a nonabsorbing solvent is directly proportional to the concentration…
What Materials Make the Best Crystals?Intermediate-Level Science ProjectsChemistryCan You Be a Human Battery?What Materials Make the Best Crystals? Growing crystals isn't difficult, and it makes a…
(Encyclopedia) naphthanaphthanăpˈthə, năfˈ– [key], term usually restricted to a class of colorless, volatile, flammable liquid hydrocarbon mixtures. Obtained as one of the more volatile fractions in…
(Jan Ludvik Hoch)publisher, media mogulBorn: 6/10/1923Birthplace: Slatinske Dòly, Czech Republic He fled the Nazi invasion of Czecholovakia in 1939 and settled in Britain, though most of his family…
(Encyclopedia) ink, pigmented fluid used for writing and drawing, or a viscous compound used for printing, both of various colors but most frequently black. The oldest known variety, India ink or…
