8th Grade Word List - Science

Words for students of 8th Grade, the page is for science words (List 1), which are essential vocabulary for 8th Grade academic classes.
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 8th Grade: 8th Grade Word List - Science (List 1)
abiotic
Speak
physical rather than biological; not derived from living organisms
acceleration
Speak
faster rate of improvement; rate of change of velocity with respect to time
biotic
Speak
of or relating to living organisms
chemical compound
Speak
a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
chemical element
Speak
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
Speak
that part of the energy in a substance that can be released by a chemical reaction
chemical reaction
Speak
a process in which one or more substances are changed into others
comets
Speak
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
Speak
a speed that does not change how fast it is, or the direction that it is in
continental drift
Speak
the gradual movement and formation of continents (as described by plate tectonics)
continental glaciation
Speak
unrestricted ice sheets that once covered much of the northern continents but are now found only at high latitudes
control
Speak
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
Speak
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
Speak
the act of dispersing or diffusing something
DNA
Speak
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
Speak
exercising influence or control; major; important; outweighing
elements
Speak
substance composed of atoms having an identical number of protons in each nucleus
forces
Speak
vector quantity that tends to produce an acceleration of a body in the direction of its application
hypothesis
Speak
assumption; theory
Law of Conservation of Matter
Speak
a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
monohybrid cross
Speak
genetic cross using a single trait with two alleles
net forces
Speak
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
Speak
three physical laws that together laid the foundation for classical mechanics
pH
Speak
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
Speak
the branch of geology studying the folding and faulting of the earth's crust
Punnett square
Speak
a diagram that is used to predict an outcome of a particular cross or breeding experiment
recessive traits
Speak
a genetic trait that results from the expression of the two recessive alleles
rock cycle
Speak
an cycle of processes undergone by rocks in the earth's crust