ACT testprep science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| ammonium nitrate | a white crystalline solid used as a fertilizer and as a component of some explosives.
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| biotic index | Scheme for grading river quality according to the diversity and abundance of the river fauna present, with particular reference to ‘key species’ with known pollution tolerances.
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| calcareous ooze | is a calcium carbonate mud formed from the hard parts (tests) of the bodies of free-floating organisms.
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| calcite | a white or colorless mineral consisting of calcium carbonate. It is a major constituent of sedimentary rocks such as limestone, marble, and chalk, can occur in crystalline form
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| capillary | any of the fine branching blood vessels that form a network between the arterioles and venules.
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| colorimeter | an instrument for measuring the intensity of color.
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| crown fire | a forest fire that spreads from treetop to treetop.
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| emit | produce and discharge (something, especially gas or radiation).
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| exclusion | the process or state of excluding or being excluded.
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| chromatography | the separation of a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates.
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| genus | a principal taxonomic category that ranks above species and below family, and is denoted by a capitalized Latin name,
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| hexane | a colorless liquid hydrocarbon of the alkane series.
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| infrared | having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves.
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| joule | the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of action of the force, equivalent to one 3600th of a watt-hour.
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| meiosis | a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
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| mesopause | he boundary in the earth's atmosphere between the mesosphere and the thermosphere, at which the temperature stops decreasing with increasing height and begins to increase.
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| milli-bar | one thousandth of a bar, the cgs unit of atmospheric pressure equivalent to 100 pascals.
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| migratory | denoting an animal that migrates.
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| aperture | an opening, hole, or gap.
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| paleozoic | of, relating to, or denoting the era between the Precambrian eon and the Mesozoic era.
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| pinnate | (of a compound leaf) having leaflets arranged on either side of the stem, typically in pairs opposite each other.
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| polystyrene | a synthetic resin that is a polymer of styrene, used chiefly as lightweight rigid foams and films.
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| rallies | (of troops) come together again in order to continue fighting after a defeat or dispersion.
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| plutonium | he chemical element of atomic number 94, a dense silvery radioactive metal of the actinide series, used as a fuel in nuclear reactors and as an explosive in nuclear fission weapons.
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| radar pulse | radar that operates by emitting and receiving pulses at signal
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| seemingly | so as to give the impression of having a certain quality; apparently.
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| sucrose | a compound that is the chief component of cane or beet sugar.
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| tropopause | the interface between the troposphere and the stratosphere
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| uranium series | a radioactive series beginning with uranium I of mass number 238 and ending with radium G
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| zoning | divide into or assign to zones, in particular.
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