Update 2025-2026 235 Questions and 100%
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4 eons - CORRECT ANSWER: Hadean, Archean, Proterozoic, and Phanerozoic
Acceleration - CORRECT ANSWER: Term for any change in an object's speed and/or
direction
Air mass - CORRECT ANSWER: Large body of air with the same temperature, humidity,
and pressure
amplitude - CORRECT ANSWER: The distance between a wave's equilibrium and
crest/trough in a transverse wave, or how compressed/expanded the medium becomes
in a longitudinal wave
asteroids - CORRECT ANSWER: Very small, rocky bodies that orbit the sun
Atom - CORRECT ANSWER: The basic building block of matter
atomic number - CORRECT ANSWER: The number of protons in the nucleus of an
atom
balanced forces - CORRECT ANSWER: Term for forces that combine to produce a net
force of 0
Cenozoic era - CORRECT ANSWER: Current era, the age of mammals
,Chemical - CORRECT ANSWER: Any substance that has a definite, fixed composition
chemical bonds - CORRECT ANSWER: the attractive forces that hold atoms together
chemical change - CORRECT ANSWER: When matter changes in chemical
composition
chemical potential energy - CORRECT ANSWER: Energy that is stored in the chemical
bonds in a substance
chemical reaction - CORRECT ANSWER: When chemical bonds are formed/broken in a
chemical change
chemical weathering - CORRECT ANSWER: Weathering resulting from chemical
processes
Chemistry - CORRECT ANSWER: The study of atoms and molecules, their structures,
and their interactions to form substances
coefficient - CORRECT ANSWER: Number used to indicate the ratio of chemicals in a
reaction, written before chemical formula
cold front - CORRECT ANSWER: A front where cold air moves in under a warm air
mass.
comets - CORRECT ANSWER: Relatively small, icy, dusty bodies that travel around the
sun in very elliptical orbits
Compound - CORRECT ANSWER: a chemical combination of two or more different
elements in a fixed ratio
,compression - CORRECT ANSWER: Region of longitudinal wave where particles are
close together
computer model - CORRECT ANSWER: A detailed, complex model calculated by a
computer
conceptual model - CORRECT ANSWER: A model used to visualize things that cannot
be seen, such as atoms
continental to continental boundary - CORRECT ANSWER: A convergent boundary
between two continental plates with no subduction, causing tall mountain ranges with no
volcanoes but large earthquakes
control variable - CORRECT ANSWER: The variable(s) you don't want to study, need to
be either eliminated or kept constant
Convection - CORRECT ANSWER: The transfer of thermal energy by the circulation or
movement of a liquid or gas
convection cell - CORRECT ANSWER: A circular pattern of rising warm air and sinking
cool air
convergent boundary - CORRECT ANSWER: A tectonic plate boundary where the
plates push into each other, causing large quakes
covalent bond - CORRECT ANSWER: Bond formed between atoms that share valence
electrons
crest - CORRECT ANSWER: The highest point in a wave above equilibrium
, crust - CORRECT ANSWER: Thin, outermost rocky shell at the surface of the earth
dependent variable - CORRECT ANSWER: The variable that changes because of an
independent variable
deposition - CORRECT ANSWER: The process in which soil, sediment, or rocks are
added to a landform
Derived units - CORRECT ANSWER: What is produced when the base units/quantities
are combined
direct relationship - CORRECT ANSWER: A relationship between two variables where
increasing one increases the other, and vice versa
divergent boundary - CORRECT ANSWER: A tectonic plate boundary where the plates
are separating, with volcanoes and few, weak quakes
ductility - CORRECT ANSWER: The ability to be stretched into wire
Earth science - CORRECT ANSWER: The study of the Earth's structure and
composition, and processes that change Earth
Elastic collision - CORRECT ANSWER: A collision in which the total kinetic energy is
conserved
elastic potential energy - CORRECT ANSWER: Energy stored in stretched springs,
rubber bands, etc.
elasticity - CORRECT ANSWER: The amount of bounce an object has after a collision