rate of change in velocity, usually expressed in meters per
second; involves an increase or decrease in speed and/or a change in direction
What is acceleration?
100
the smallest unit of a chemical element that can still retain
the properties of that element
What is an atom?
100
the energy possessed by a body because of its motion
What is kinetic energy?
100
a type of simple machine; consists of a rigid bar that pivots
about a fulcrum, used to transmit and enhance power or
motion
What is a lever?
100
the factor that is changed in an experiment in order to study
changes in the dependent variable
What is independent variable?
200
force of air on moving objects
What is air resistance?
200
a stable elementary particle that is negatively charged and
orbits the nucleus of an atom
What is an electron?
200
the emission and propagation of the entire range of the
electromagnetic spectrum including: gamma rays, x-rays,ultraviolet radiation, visible light, microwaves, and radiowaves
What is electromagnetic radiation?
200
a type of simple machine; a circular lever, usually a wheel
with a groove where a rope can be placed and used to
change the direction of a force
What is pulley?
200
factor being measured or observed in an experiment
What is dependent variable?
300
a force that opposes the relative motion of two material
surfaces in contact with one another
What is friction?
300
a subatomic particle having zero charge, found in the
nucleus of an atom
What is a neutron?
300
internal energy found by adding the kinetic energy of
particles making up a substance
What is thermal energy?
300
a change in direction of a wave that occurs as it passes
from one medium to another of different density
What is refraction?
300
a set of objects, organisms, or different parts acting to form
a whole
What is system?
400
the lowest point on a wave
What is trough?
400
a subatomic particle having a positive charge and which is
found in the nucleus of an atom
What is proton?
400
a measure of randomness or disorder of a closed system
What is an entropy?
400
a type of simple machine that consist of an inclined plane
wrapped around a cylinder
What is screw?
400
a procedure that is carried out and repeated under controlled conditions in order to discover, demonstrate, or
test a hypothesis; includes all components of the scientific
method
What is experiment?
500
the distance between crest of a wave
What is wavelength?
500
a particle, object, or system that lacks a net charge
What is neutral?
500
a change of energy from one form to another (e.g.,
mechanical to electrical, solar to electrical)
What is energy transfer?
500
the bouncing off or turning back of light, sound, or heat
from a surface
What is reflection?
500
a procedure that is carried out in order to observe a
response caused by a stimulus; not a complete experiment