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ACT testprep science

TermDefinition
ammonium nitrate a white crystalline solid used as a fertilizer and as a component of some explosives.
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.
calcareous ooze is a calcium carbonate mud formed from the hard parts (tests) of the bodies of free-floating organisms.
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
capillary any of the fine branching blood vessels that form a network between the arterioles and venules.
colorimeter an instrument for measuring the intensity of color.
crown fire a forest fire that spreads from treetop to treetop.
emit produce and discharge (something, especially gas or radiation).
exclusion the process or state of excluding or being excluded.
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.
genus a principal taxonomic category that ranks above species and below family, and is denoted by a capitalized Latin name,
hexane a colorless liquid hydrocarbon of the alkane series.
infrared having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves.
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.
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. 2.
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.
milli-bar one thousandth of a bar, the cgs unit of atmospheric pressure equivalent to 100 pascals.
migratory denoting an animal that migrates.
aperture an opening, hole, or gap.
paleozoic of, relating to, or denoting the era between the Precambrian eon and the Mesozoic era.
pinnate (of a compound leaf) having leaflets arranged on either side of the stem, typically in pairs opposite each other.
polystyrene a synthetic resin that is a polymer of styrene, used chiefly as lightweight rigid foams and films.
rallies (of troops) come together again in order to continue fighting after a defeat or dispersion.
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.
radar pulse radar that operates by emitting and receiving pulses at signal
seemingly so as to give the impression of having a certain quality; apparently.
sucrose a compound that is the chief component of cane or beet sugar.
tropopause the interface between the troposphere and the stratosphere
uranium series a radioactive series beginning with uranium I of mass number 238 and ending with radium G
zoning divide into or assign to zones, in particular.
Created by: Allie4316