AFOQT PHYSICAL SCIENCE 2025 WITH
100% ACCURATE SOLUTIONS
The lowest possible temperature - ✅✅✅CORRECT -Absolut Zero
The pressure exerted by the gases in the air. units of measurement are kilopascals, atmospheres,
millimeters of mercury, and Torr - ✅✅✅CORRECT -atmospheric Pressure
Pressure is 100 kPa, 1atm, 760 mm Hg or 760 Torr - ✅✅✅CORRECT -standard atmospheric pressure
the smallest particle of an element a nucleus and its surrounding electrons. - ✅✅✅CORRECT -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 -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 -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 -atomic weight
the temperature at which a substance undergoes a phase change from a liquid to a gas. -
✅✅✅CORRECT -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 -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 -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 -compound
the formation of a liquid from a gas. this is a change of state, also called a phase change. -
✅✅✅CORRECT -condensation
the exchange of heat (heat conduction) by contact with another object, or allowing the flow of electrons
(electrical conduction) - ✅✅✅CORRECT -conduction
the exchange of heat energy with the surroundings produced by the flow of a fluid due to being heated
or cooled. - ✅✅✅CORRECT -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
-decay
the mass per unit volume - ✅✅✅CORRECT -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 -diffusion
to break down a substance in a solution without causing a reaction - ✅✅✅CORRECT -dissolve
the energy produced by an electrochemical cell and measured by the voltage or electromotive force. -
✅✅✅CORRECT -electrical potential
a tiny, negatively charged particle that is part of an atom. the flow of electrons through a solid material
such as a wire produces an electric current. - ✅✅✅CORRECT -electron
100% ACCURATE SOLUTIONS
The lowest possible temperature - ✅✅✅CORRECT -Absolut Zero
The pressure exerted by the gases in the air. units of measurement are kilopascals, atmospheres,
millimeters of mercury, and Torr - ✅✅✅CORRECT -atmospheric Pressure
Pressure is 100 kPa, 1atm, 760 mm Hg or 760 Torr - ✅✅✅CORRECT -standard atmospheric pressure
the smallest particle of an element a nucleus and its surrounding electrons. - ✅✅✅CORRECT -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 -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 -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 -atomic weight
the temperature at which a substance undergoes a phase change from a liquid to a gas. -
✅✅✅CORRECT -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 -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 -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 -compound
the formation of a liquid from a gas. this is a change of state, also called a phase change. -
✅✅✅CORRECT -condensation
the exchange of heat (heat conduction) by contact with another object, or allowing the flow of electrons
(electrical conduction) - ✅✅✅CORRECT -conduction
the exchange of heat energy with the surroundings produced by the flow of a fluid due to being heated
or cooled. - ✅✅✅CORRECT -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
-decay
the mass per unit volume - ✅✅✅CORRECT -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 -diffusion
to break down a substance in a solution without causing a reaction - ✅✅✅CORRECT -dissolve
the energy produced by an electrochemical cell and measured by the voltage or electromotive force. -
✅✅✅CORRECT -electrical potential
a tiny, negatively charged particle that is part of an atom. the flow of electrons through a solid material
such as a wire produces an electric current. - ✅✅✅CORRECT -electron
