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surface chemistry
surface chemistry study of chemical reactions in which the reactants are first adsorbed onto a surface medium (see adsorption ) that then acts as a catalyst for the reaction; after the reaction the products are desorbed and the surface is left unchanged. Since the entire reaction takes place on ...
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rustication
rustication , in building construction, method of creating textures upon masonry wall surfaces, chiefly upon those of stone, by projecting the blocks beyond the surface of the mortar joints. Each joint thus lies in a channel or in a V-shaped groove, between adjoining stones, and a separating shadow ...
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Venus
Venus in astronomy, 2d planet from the sun; it is often called the evening star or morning star and is brighter than any object in the sky except the sun and the moon. Because its orbit lies between the sun and the orbit of the earth, Venus passes through phases like those of the moon, varying fr...
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Europa
Europa yoorō´pe , in astronomy, one of the 39 known moons, or natural satellites, of Jupiter . Magnetic-field data collected by the space probe Galileo in 2002 strongly indicates a liquid-water ocean—similar to oceans found on Earth and possibly capable of supporting simple life...
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dew
dew thin film of water that has condensed on the surface of objects near the ground. Dew forms when radiational cooling of these objects during the nighttime hours also cools the shallow layer of overlying air in contact with them, causing the condensation of some water vapor. This condensation o...
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liquid
liquid one of the three commonly recognized states in which matter occurs, i.e., that state, as distinguished from solid and gas, in which a substance has a definite volume but no definite shape.
Properties of Liquids
In general, liquids show expansion on heating, contraction on cooling...
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pavement
pavement the wearing surface of a road, street, or sidewalk. Parts of Babylon and Troy are believed to have been paved; Roman roads were noted for their durable stone paving. Cobblestones were common from late medieval times into the 19th cent. A pavement known as macadam road, introduced in Engl...
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adit
adit , in mining, underground passage excavated nearly horizontally, with one end open to the earth's surface, usually used to service a mine. The adit end is the furthermost end from the surface, i.e., the location where miners work. The adit collar is the area where an adit opens to the surface an...
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land mine
land mine an explosive mine laid on or just under the surface of the ground....
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precipitation
precipitation in meteorology, condensed moisture that falls to the surface of the earth in the form of rain , sleet , snow , hail , frost , or dew .
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