the smallest unit of a chemical element that can still retain
the properties of that element.
Atom
100
unit of energy; the amount of heat needed to raise one gram
of water one degree Celsius at standard atmospheric
pressure
Calorie
100
one of the fundamental states of matter in which molecules
do not have fixed volume or shape
Gas
100
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
Experiment
200
a quality that tends to produce movement or acceleration of
a body in the direction of its application; a push or a pull
force
200
a stable elementary particle that is negatively charged and orbits the nucleus of an atom.
Electron
200
a quantity that describes the capacity to do work; a source
of usable power
Energy
200
electromagnetic radiation that lies within the visible range
Light
200
a set of objects, organisms, or different parts acting to form
a whole
System
300
the observed effect of the force of gravitation
Gravity
300
a subatomic particle having zero charge, found in the
nucleus of an atom
Neutron
300
a form of energy resulting from the temperature difference
between a system and its surroundings
heat
300
one of the fundamental states of matter with a definite
volume but no definite shape
Liquid
300
the event, condition, or factor that can be changed or
controlled in order to study or test a hypothesis in a
scientific experiment
Variable
400
amount of distance traveled divided by time taken; the
time-rate at which any physical process takes place
Speed
400
a subatomic particle having a positive charge and which is
found in the nucleus of an atom
Proton
400
emission of energy in the form of rays or waves
Radiation
400
having a definite shape and a definite volume; one of the
fundamental states of matter
Solid
400
a procedure that is carried out in order to observe a
response caused by a stimulus; not a complete experiment
investigation
500
the time-rate at which a body changes its position; defined
as displacement divided by the time of travel
Velocity
500
a substance that cannot be reduced to a simpler substance
by chemical means
Element
500
the process in which a liquid is converted to its vapor
phase by heating the liquid
Evaporation
500
a measure of the amount of space an object takes up; also
the loudness of a sound or signal
Volume
500
a plan of inquiry that uses science process skills as a tool to
gather, organize, analyze, and communicate information