AFOQT Physical Science questions with 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
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
