one of the fundamental states of matter in which molecules do not have fixed volume or shape
What is gas
100
a procedure that is carried out in order to observe
What is an investigation
200
peak or highest point on a wave
What is a crest
200
a substance that cannot be reduced to a simpler substance by chemical means
What is element
200
unit of energy; the amount of heat needed to raise one gram of water one degree Celsius at standard atmospheric pressure
What is a calorie
200
an interconnection of electrical elements forming a
complete path for the flow of current
What is a circuit
200
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 an experiment
300
a force that opposes the relative motion of two material surfaces in contact with one another
What is friction
300
a particle, object, or system that lacks a net charge
What is neutral
300
emission of energy in the form of rays or wave
What is radiation
300
a reaction or a change in a substance produced by
chemical means that results in producing a different
chemical
What is chemical change
300
a set of objects, organisms, or different parts acting to form
a whole
What is a system
400
amount of distance traveled divided by time taken; the
time-rate at which any physical process takes place
What is speed
400
a stable elementary particle that is negatively charged and
orbits the nucleus of an atom
What is an electron
400
a form of energy resulting from the temperature difference
between a system and its surroundings
What is heat
400
a physical change that occurs when matter changes to
another state (i.e., liquid, gas, or solid)
What is a change of state
400
a procedure that is carried out in order to observe a
response caused by a stimulus; not a complete experiment
What is investigation
500
a quality that tends to produce movement or acceleration of a body in the direction of its application; a push or a pull
What is force
500
a subatomic particle having a positive charge and which is found in the nucleus of an atom
What is a proton
500
a measure of randomness or disorder of a closed system
What is entropy
500
a substance made up of a combination of two or more
elements held together by chemical bonds that cannot be
separated by physical means
What is compound
500
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