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Cosmic dust
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volcanic dust
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Dust Bowl
Dust Bowl the name given to areas of the U.S. prairie states that suffered ecological devastation in the 1930s and then to a lesser extent in the mid-1950s. The problem began during World War I, when the high price of wheat and the needs of Allied troops encouraged farmers to grow more wheat by... Read more |
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Ashes
ashes the powdery residue left after something is burned, often taken as a symbol of mourning or penitence (as in sackcloth and ashes).The Ashes is a trophy for the winner of a series of test matches in a cricket season between England and Australia. The name comes from a mock obituary notice... Read more |
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Cosmochemistry
cosmochemistry Cosmochemistry is concerned with experimental, observational, and theoretical studies of the chemical, isotopic, and mineralogical composition of extraterrestrial materials such as cometary dust particles (e.g., the Giotto mission to comet P/Halley), interplanetary dust particles... Read more |
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Aphra
Aphra ♀ Of uncertain origin. It could be an altered spelling of a Late Latin name, Afra. This was originally an ethnic name for a woman from Africa (in Roman times meaning the area around Carthage). It was used in the post-classical period as a nickname for a dark person, and eventually... Read more |
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whirlwind
whirlwind revolving mass of air resulting from local atmospheric instability, such as that caused by intense heating of the ground by the sun on a hot summer day. Examples of whirlwinds are waterspouts , tornadoes , small whirls of dust or leaves, and the sand whirls of the desert, called dust... Read more |
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silverpoint
silverpoint method of drawing whereby a silver-tipped instrument is dragged across paper prepared with ground bone dust and gum water and then tinted with a pigment. The procedure results in drawings of extraordinary delicacy. It was used extensively in Europe from the late Middle Ages to the early... Read more |
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Soil Conservation
SOIL CONSERVATION CONCEPT With the rise of the environmentalist movement in the 1960s and afterward, it has become common to speak of conserving natural resources such as trees or fossil fuels. Yet long before humans recognized the need to make responsible use of things... Read more |
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dust
dust Dust can be loosely defined as a suspension of solid particles in air, or a deposit of such particles which have been transported and deposited by the wind. Dust particles which are transported in suspension in the Earth's atmosphere are mostly smaller than 100 micrometres (μm) and a... Read more |
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