AFOQT Physical Science UPDATED
ACTUAL Exam Questions and CORRECT
Answers
The lowest possible temperature - CORRECT ANSWER - Absolut Zero
The pressure exerted by the gases in the air. units of measurement are kilopascals, atmospheres,
millimeters of mercury, and Torr - CORRECT ANSWER - atmospheric Pressure
Pressure is 100 kPa, 1atm, 760 mm Hg or 760 Torr - CORRECT ANSWER - standard
atmospheric pressure
the smallest particle of an element a nucleus and its surrounding electrons. - CORRECT
ANSWER - Atom
the mass of an atom measured in atomic mass units (amu). an atomic mass unit is equal to one-
twelfth of the atom of carbon-12. atomic mass is now more generally used instead of atomic
weight. Example: the atomic mass of chlorine is about 35amu. - CORRECT ANSWER -
atomic mass
also known as proton number, it is the number of electrons or the number of protons in an atom.
example: the atomic number of gold is 79. - CORRECT ANSWER - atomic number
a common term used to mean the average molar mass of an element. this is the mass per mole of
atoms. Ex: the atomic weight of chlorine is about 35g/mol - CORRECT ANSWER -
atomic weight
the temperature at which a substance undergoes a phase change from a liquid to a gas. -
CORRECT ANSWER - boiling point.
, a temperature scale on which the freezing point of water is at 0 degrees and the normal boiling
point at standard atmospheric pressure is 100 degrees. - CORRECT ANSWER - celsius
scale
a change between two of the three states of matter, solid, liquid and gas. example when water
evaporates t changes from a liquid to a gaseous state. - CORRECT ANSWER - change of
state.
a chemical consisting of two or more elements chemically bonded together. example: calcium
can combine with carbon and oxygen to make calcium carbonate a compound of all three
elements. - CORRECT ANSWER - compound
the formation of a liquid from a gas. this is a change of state, also called a phase change. -
CORRECT ANSWER - condensation
the exchange of heat (heat conduction) by contact with another object, or allowing the flow of
electrons (electrical conduction) - CORRECT ANSWER - conduction
the exchange of heat energy with the surroundings produced by the flow of a fluid due to being
heated or cooled. - CORRECT ANSWER - convection
the way that a radioactive element changes into another element due to loss of was through
radiation. Example: uranium 238 decays with the loss of an alpha particle to form thorium 234. -
CORRECT ANSWER - decay
the mass per unit volume - CORRECT ANSWER - density
the slow mixing of one substance with another until the two substances are evenly mixed. mixing
occurs because of differences in concentration within the mixture. _______ works rapidly with
gases, very slowly with liquids. - CORRECT ANSWER - diffusion
ACTUAL Exam Questions and CORRECT
Answers
The lowest possible temperature - CORRECT ANSWER - Absolut Zero
The pressure exerted by the gases in the air. units of measurement are kilopascals, atmospheres,
millimeters of mercury, and Torr - CORRECT ANSWER - atmospheric Pressure
Pressure is 100 kPa, 1atm, 760 mm Hg or 760 Torr - CORRECT ANSWER - standard
atmospheric pressure
the smallest particle of an element a nucleus and its surrounding electrons. - CORRECT
ANSWER - Atom
the mass of an atom measured in atomic mass units (amu). an atomic mass unit is equal to one-
twelfth of the atom of carbon-12. atomic mass is now more generally used instead of atomic
weight. Example: the atomic mass of chlorine is about 35amu. - CORRECT ANSWER -
atomic mass
also known as proton number, it is the number of electrons or the number of protons in an atom.
example: the atomic number of gold is 79. - CORRECT ANSWER - atomic number
a common term used to mean the average molar mass of an element. this is the mass per mole of
atoms. Ex: the atomic weight of chlorine is about 35g/mol - CORRECT ANSWER -
atomic weight
the temperature at which a substance undergoes a phase change from a liquid to a gas. -
CORRECT ANSWER - boiling point.
, a temperature scale on which the freezing point of water is at 0 degrees and the normal boiling
point at standard atmospheric pressure is 100 degrees. - CORRECT ANSWER - celsius
scale
a change between two of the three states of matter, solid, liquid and gas. example when water
evaporates t changes from a liquid to a gaseous state. - CORRECT ANSWER - change of
state.
a chemical consisting of two or more elements chemically bonded together. example: calcium
can combine with carbon and oxygen to make calcium carbonate a compound of all three
elements. - CORRECT ANSWER - compound
the formation of a liquid from a gas. this is a change of state, also called a phase change. -
CORRECT ANSWER - condensation
the exchange of heat (heat conduction) by contact with another object, or allowing the flow of
electrons (electrical conduction) - CORRECT ANSWER - conduction
the exchange of heat energy with the surroundings produced by the flow of a fluid due to being
heated or cooled. - CORRECT ANSWER - convection
the way that a radioactive element changes into another element due to loss of was through
radiation. Example: uranium 238 decays with the loss of an alpha particle to form thorium 234. -
CORRECT ANSWER - decay
the mass per unit volume - CORRECT ANSWER - density
the slow mixing of one substance with another until the two substances are evenly mixed. mixing
occurs because of differences in concentration within the mixture. _______ works rapidly with
gases, very slowly with liquids. - CORRECT ANSWER - diffusion
