Elementary Academic Words

Words for students from kindergarten to grade 8, each grade has 4 lists: art, math, science, and social. They are essential vocabulary for elementary academic classes.

Grade 8: Word List - Science

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abiotic  Read Word
physical rather than biological; not derived from living organisms
acceleration  Read Word
faster rate of improvement; rate of change of velocity with respect to time
biotic  Read Word
of or relating to living organisms
chemical compound  Read Word
a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
chemical element  Read Word
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
chemical energy  Read Word
that part of the energy in a substance that can be released by a chemical reaction
chemical reaction  Read Word
a process in which one or more substances are changed into others
comets  Read Word
celestial object consisting of a nucleus of ice and dust and, when near the sun, a tail of gas and dust particles pointing away from the sun
constant velocity  Read Word
a speed that does not change how fast it is, or the direction that it is in
continental drift  Read Word
the gradual movement and formation of continents (as described by plate tectonics)
continental glaciation  Read Word
unrestricted ice sheets that once covered much of the northern continents but are now found only at high latitudes
control  Read Word
a relation of constraint of one entity (thing or person or group) by another; the state that exists when one person or group has power over another
crustal deformation  Read Word
referring to the physical deformation of land, the change occurs from within the earth's crust due to the folding and faulting processes that affect the continental plates
dispersal  Read Word
the act of dispersing or diffusing something
DNA  Read Word
a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information
dominant  Read Word
exercising influence or control; major; important; outweighing
elements  Read Word
substance composed of atoms having an identical number of protons in each nucleus
forces  Read Word
vector quantity that tends to produce an acceleration of a body in the direction of its application
hypothesis  Read Word
assumption; theory
Law of Conservation of Matter  Read Word
a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
monohybrid cross  Read Word
genetic cross using a single trait with two alleles
net forces  Read Word
a measure of the force being exerted on an object; zero net force means an object is at rest or moving at a constant speed
Newton laws of motion  Read Word
three physical laws that together laid the foundation for classical mechanics
pH  Read Word
a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid, and higher values more alkaline
plate tectonics  Read Word
the branch of geology studying the folding and faulting of the earth's crust
Punnett square  Read Word
a diagram that is used to predict an outcome of a particular cross or breeding experiment
recessive traits  Read Word
a genetic trait that results from the expression of the two recessive alleles
rock cycle  Read Word
an cycle of processes undergone by rocks in the earth's crust