1|Page
EOG REVIEW 8TH GRADE SCIENCE NC EXAM
LATEST 2024/2025 UPDATED QUESTIONS AND
CORRECT DETAILED ANSWERS GRADED A+
atom - ....ANSWER ....✔✔ Basic unit of matter
atomic mass - ....ANSWER ....✔✔ Equals the # of
protons + # of neutrons in an atom's nucleus
atomic number - ....ANSWER ....✔✔ Equals to the
number of protons in an atom's nucleus. PT is arranged
by increasing atomic #.
chemical formula - ....ANSWER ....✔✔ a formula that
shows what elements are in a compound by using their
symbols and the specific ratio of atoms (subscripts)
chemical property - ....ANSWER ....✔✔ a property of
matter that describes a substance's ability to participate
in chemical reactions
,2|Page
conductor - ....ANSWER ....✔✔ a substance that
readily conducts electricity and/or heat
covalent bond - ....ANSWER ....✔✔ a chemical bond
that involves sharing a pair of electrons between atoms
in a molecule; usually between two nonmetals
density - ....ANSWER ....✔✔ The amount of matter in
a given space, mass divided by volume
metalloid - ....ANSWER ....✔✔ an element that has
some characteristics of metals and some characteristics
of nonmetals
ductile - ....ANSWER ....✔✔ means that a material
can be stretched into a wire (metals)
electron - ....ANSWER ....✔✔ negatively charged
particle; located OUTSIDE the atomic NUCLEUS in
electron cloud
element - ....ANSWER ....✔✔ a pure substance made
of only one kind of atom
,3|Page
group - ....ANSWER ....✔✔ A.k.a: family
Column of elements in PT. Goes up & down
inert - ....ANSWER ....✔✔ having only a limited ability
to react chemically
insulator - ....ANSWER ....✔✔ a material that does not
allow heat or electrons to move through it easily
ion - ....ANSWER ....✔✔ a particle that is electrically
charged (positive or negative)
magnetism - ....ANSWER ....✔✔ A property of some
materials in which there is a force of repulsion or
attraction between certain like and unlike poles
malleable - ....ANSWER ....✔✔ means that a material
can be hammered or shaped (metals)
matter - ....ANSWER ....✔✔ Anything that has mass
and takes up space
, 4|Page
metal - ....ANSWER ....✔✔ Elements characterized by
physical properties that include shininess, malleability,
ductility, and conductivity
mixture - ....ANSWER ....✔✔ A combination of two or
more substances that are NOT chemically combined
molecule - ....ANSWER ....✔✔ two or more atoms held
together by covalent bonds
neutron - ....ANSWER ....✔✔ a small particle in the
nucleus of the atom, with no electrical charge
nonmetal - ....ANSWER ....✔✔ Elements that are
usually characterized as being OPPOSITE of metals
{physical properties: dull, brittle, do not conduct heat or
electricity well (insulators)}
nucleus - ....ANSWER ....✔✔ the positively charged
dense center of an atom
period - ....ANSWER ....✔✔ a ROW of elements PT.
Goes left to right.
EOG REVIEW 8TH GRADE SCIENCE NC EXAM
LATEST 2024/2025 UPDATED QUESTIONS AND
CORRECT DETAILED ANSWERS GRADED A+
atom - ....ANSWER ....✔✔ Basic unit of matter
atomic mass - ....ANSWER ....✔✔ Equals the # of
protons + # of neutrons in an atom's nucleus
atomic number - ....ANSWER ....✔✔ Equals to the
number of protons in an atom's nucleus. PT is arranged
by increasing atomic #.
chemical formula - ....ANSWER ....✔✔ a formula that
shows what elements are in a compound by using their
symbols and the specific ratio of atoms (subscripts)
chemical property - ....ANSWER ....✔✔ a property of
matter that describes a substance's ability to participate
in chemical reactions
,2|Page
conductor - ....ANSWER ....✔✔ a substance that
readily conducts electricity and/or heat
covalent bond - ....ANSWER ....✔✔ a chemical bond
that involves sharing a pair of electrons between atoms
in a molecule; usually between two nonmetals
density - ....ANSWER ....✔✔ The amount of matter in
a given space, mass divided by volume
metalloid - ....ANSWER ....✔✔ an element that has
some characteristics of metals and some characteristics
of nonmetals
ductile - ....ANSWER ....✔✔ means that a material
can be stretched into a wire (metals)
electron - ....ANSWER ....✔✔ negatively charged
particle; located OUTSIDE the atomic NUCLEUS in
electron cloud
element - ....ANSWER ....✔✔ a pure substance made
of only one kind of atom
,3|Page
group - ....ANSWER ....✔✔ A.k.a: family
Column of elements in PT. Goes up & down
inert - ....ANSWER ....✔✔ having only a limited ability
to react chemically
insulator - ....ANSWER ....✔✔ a material that does not
allow heat or electrons to move through it easily
ion - ....ANSWER ....✔✔ a particle that is electrically
charged (positive or negative)
magnetism - ....ANSWER ....✔✔ A property of some
materials in which there is a force of repulsion or
attraction between certain like and unlike poles
malleable - ....ANSWER ....✔✔ means that a material
can be hammered or shaped (metals)
matter - ....ANSWER ....✔✔ Anything that has mass
and takes up space
, 4|Page
metal - ....ANSWER ....✔✔ Elements characterized by
physical properties that include shininess, malleability,
ductility, and conductivity
mixture - ....ANSWER ....✔✔ A combination of two or
more substances that are NOT chemically combined
molecule - ....ANSWER ....✔✔ two or more atoms held
together by covalent bonds
neutron - ....ANSWER ....✔✔ a small particle in the
nucleus of the atom, with no electrical charge
nonmetal - ....ANSWER ....✔✔ Elements that are
usually characterized as being OPPOSITE of metals
{physical properties: dull, brittle, do not conduct heat or
electricity well (insulators)}
nucleus - ....ANSWER ....✔✔ the positively charged
dense center of an atom
period - ....ANSWER ....✔✔ a ROW of elements PT.
Goes left to right.
