AFOQT: Physical Science UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Absolute Zero - CORRECT ANSWER - The Lowest Possible Temperature. (-273.15 C)
Atmospheric Pressure/Standard Atmospheric Pressure - CORRECT ANSWER - The
pressure Exerted By Gases In The Air.
- kPa, atm, mm, Hg, Torr
- 100kPa=1, atm=760mm Hg=760 Torr
Atom - CORRECT ANSWER - The Smallest Possible Particle of an Element.
Atomic Mass - CORRECT ANSWER - The Mass of an Atom, Measured by amu.
Atomic Number - CORRECT ANSWER - Also known as proton number, it is the number
of electrons or the the number of protons in an atom.
Example: the ____ of gold is 79.
Atomic Weight - CORRECT ANSWER - The Average Molar Mass of an Element
(Cl=35g/mol)
Compound - CORRECT ANSWER - A chemical consisting of two or more Elements
Chemically Bonded Together (CaCO3)
Convection - CORRECT ANSWER - The Exchange of Heat Energy With Surroundings
Produced by the Flow of a fluid due to being heated or cooled.
, Conduction - CORRECT ANSWER - The exchange of heat by contact with another object
or allowing the flow of electrons.
Decay (Radioactive Decay) - CORRECT ANSWER - The way that a radioactive element
changes into another element due to loss of mass through radiation.
Example: Uranium 238 decays with the loss of an alpha particle to form Thorium 234.
Gamma Rays - CORRECT ANSWER - Waves of radiation produced as the nucleus of a
radioactive element rearranges itself into a tighter cluster of protons and neutrons.
_____ carry enough energy to damage living cells.
Half-Life - CORRECT ANSWER - The time it takes for the radiation coming from a
sample of radioactive element to decrease by half.
Heat Capacity - CORRECT ANSWER - The ratio of heat supplied to a substance,
compared with the rise temperature produced.
Heat of Combustion - CORRECT ANSWER - The amount of heat given off by the mole
of a substance during combustion.
This heat is a property of the substance and is the same no matter what kind of combustion is
invovled.
Ion - CORRECT ANSWER - An atom or group of atoms that has gained or lost one or
more electrons and developed an electric charge.
Isotope - CORRECT ANSWER - One of two or more atoms of the same element that have
the same number or protons in their nucleus.
ACTUAL Exam Questions and CORRECT
Answers
Absolute Zero - CORRECT ANSWER - The Lowest Possible Temperature. (-273.15 C)
Atmospheric Pressure/Standard Atmospheric Pressure - CORRECT ANSWER - The
pressure Exerted By Gases In The Air.
- kPa, atm, mm, Hg, Torr
- 100kPa=1, atm=760mm Hg=760 Torr
Atom - CORRECT ANSWER - The Smallest Possible Particle of an Element.
Atomic Mass - CORRECT ANSWER - The Mass of an Atom, Measured by amu.
Atomic Number - CORRECT ANSWER - Also known as proton number, it is the number
of electrons or the the number of protons in an atom.
Example: the ____ of gold is 79.
Atomic Weight - CORRECT ANSWER - The Average Molar Mass of an Element
(Cl=35g/mol)
Compound - CORRECT ANSWER - A chemical consisting of two or more Elements
Chemically Bonded Together (CaCO3)
Convection - CORRECT ANSWER - The Exchange of Heat Energy With Surroundings
Produced by the Flow of a fluid due to being heated or cooled.
, Conduction - CORRECT ANSWER - The exchange of heat by contact with another object
or allowing the flow of electrons.
Decay (Radioactive Decay) - CORRECT ANSWER - The way that a radioactive element
changes into another element due to loss of mass through radiation.
Example: Uranium 238 decays with the loss of an alpha particle to form Thorium 234.
Gamma Rays - CORRECT ANSWER - Waves of radiation produced as the nucleus of a
radioactive element rearranges itself into a tighter cluster of protons and neutrons.
_____ carry enough energy to damage living cells.
Half-Life - CORRECT ANSWER - The time it takes for the radiation coming from a
sample of radioactive element to decrease by half.
Heat Capacity - CORRECT ANSWER - The ratio of heat supplied to a substance,
compared with the rise temperature produced.
Heat of Combustion - CORRECT ANSWER - The amount of heat given off by the mole
of a substance during combustion.
This heat is a property of the substance and is the same no matter what kind of combustion is
invovled.
Ion - CORRECT ANSWER - An atom or group of atoms that has gained or lost one or
more electrons and developed an electric charge.
Isotope - CORRECT ANSWER - One of two or more atoms of the same element that have
the same number or protons in their nucleus.
