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mineral water
(Encyclopedia) mineral water, spring water containing various mineral salts, especially the carbonates, chlorides, phosphates, silicates, sulfides, and sulfates of calcium, iron, lithium, magnesium,…asphyxia
(Encyclopedia) asphyxiaasphyxiaăsfĭkˈsēə [key], deficiency of oxygen and excess of carbon dioxide in the blood and body tissues. Asphyxia, often referred to as suffocation, usually results from an…cyanobacteria
(Encyclopedia) cyanobacteriacyanobacteriasīˌənōbăktĭrˈēə, sī-ănˌō– [key] or blue-green algae, photosynthetic bacteria that contain chlorophyll. For many years they were classified in the plant…catabolism
(Encyclopedia) catabolismcatabolismkətăbˈəlĭzˌəm [key], subdivision of metabolism involving all degradative chemical reactions in the living cell. Large polymeric molecules such as polysaccharides,…Mars, in astronomy
(Encyclopedia) Mars, in astronomy, 4th planet from the sun, with an orbit next in order beyond that of the earth. Mars has two natural satellites, discovered by Asaph Hall in 1877. The innermost…Rethinking Old Technology
Electric cars are by no means new: Americans began constructing efficient “electric carriages” as far back as 1890 when William Morrison built one in Des Moines that could travel for 13…sea level
(Encyclopedia) sea level, the level of the sea, which serves as the datum used for measurement of land elevations and ocean depths. Theoretically, one would expect sea level to be a fixed and…carbon monoxide
(Encyclopedia) carbon monoxide, chemical compound, CO, a colorless, odorless, tasteless, extremely poisonous gas that is less dense than air under ordinary conditions. It is very slightly soluble in…Venus, in astronomy
(Encyclopedia) 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…The Planets - Mars
Because of its blood-red color (which comes from iron-rich dust), this planet was named for Mars, the Roman god of war. Mars is the fourth planet from the Sun, situated between Earth and…Trending
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