ACT TEST PREP SCIENC
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| amino acid | a simple organic compound containing both a carboxyl (—COOH) and an amino (—NH2) group.
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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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| beta particles | a fast-moving electron emitted by radioactive decay of substances. (The emission of beta particles was originally regarded as a ray.).
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| buoyancy | the ability or tendency to float in water or air or some other fluid
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| calcareous ooze | a calcium carbonate mud formed from the hard parts (tests) of the bodies of free-floating organisms. Once this mud has been deposited, it can be converted into stone by processes of compaction, cementation, and recrystallization.
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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 (as in Iceland spar)
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| chromatid | each of the two threadlike strands into which a chromosome divides longitudinally during cell division. Each contains a double helix of DNA.
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| cytoplasm | he material or protoplasm within a living cell, excluding the nucleus.
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| denature | destroy the characteristic properties of (a protein or other biological macromolecule) by heat, acidity, or other effects that disrupt its molecular conformation.
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| equilibrium | a state in which a process and its reverse are occurring at equal rates so that no overall change is taking place.
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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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| flask | a narrow-necked glass container, typically conical or spherical, used in a laboratory to hold reagents or samples.
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| gamma | the third letter of the Greek alphabet ( Γ, γ ), transliterated as ‘g.’
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| gas chromatograph | chromatography employing a gas as the moving carrier medium.
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| ice shelf | a floating sheet of ice permanently attached to a landmass.
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| iostope | each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element
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| ethyl acetate | a colorless, volatile liquid with a fruity smell, used as a plastics solvent and in flavorings and perfumes.
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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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| lithium chloride | a chemical compound which is salt, LiCl
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| mapping function | A mathematical expression relating observed recombination fraction (q.v.) to map distance expressed in centiMorgans
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| mesopauses | the 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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| pinnate | (especially of an invertebrate animal) having branches, tentacles, etc., on each side of an axis, like the vanes of a feather.
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| permeable | (of a material or membrane) allowing liquids or gases to pass through it.
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| paleozoic | of, relating to, or denoting the era between the Precambrian eon and the Mesozoic era.
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| polyrhythm | a rhythm that makes use of two or more different rhythms simultaneously
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| pyrotechnics | a fireworks display.
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| rallies | a quick or marked recovery after a reverse or a period of weakness.
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| retention time | the time it takes a solute to travel through the column
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| sucrose | a compound that is the chief component of cane or beet sugar.
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| revitalize | imbue (something) with new life and vitality.
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