Questions and Correct Answers | Latest
2026/2027 Edition – Full Practice and Prep Guide
The perodic table of elements - ANSWER -a table of elements arranged according
to the number of protons that each has in its atomic nucleus. Elements are arranged
in order of increasing atomic number.
Atomic number - ANSWER -the number of protons in the nucleus of an atom
Compound - ANSWER -a substance formed when two or more elements are
chemically bonded together
Organic compounds - ANSWER -compounds that contain the element carbon.
inorganic compound - ANSWER -compounds that do not contain the element
carbon
Macromolecules - ANSWER -carbohydrates, lipids, proteins, nucleic acids
are important because they are involved in all of the structures and processes of
cells and organisms.
4 organic compounds - ANSWER -CHON: carbon, hydrogen, oxygen, and
nitrogen which are all found in 96/ of all life on earth.
valence number - ANSWER -the number of electrons that an atom gains or loses
when combining with other atoms
Evidence of a chemical reaction - ANSWER -a chemical reaction has occurred if
any of the following take place: unexpected temperature change, unexpected color
change, production of gas, change in odor, or formation of a precipitate
Mixtures - ANSWER -when different substances are combined but do not react
chemically.
can be separated in the following ways: hand separation, filtration, and distillation
Distillation - ANSWER -A process that separates the substances in a solution
based on their boiling points
,Solutions - ANSWER -made of a solvent and a solute
Solvent - ANSWER -the liwquid into which something is dissolved (i.e. water)
Solute - ANSWER -a solid, gas, or liquid that is dissolved into the solvent to
make a solution.
the pH scale - ANSWER -scale with values from 0 to 14, used to measure the
concentration of H+ ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is neutral,
and a pH of 7 to 14 is basic
Acid - ANSWER -a solution in which the number of hydronium ion is greater
than the number of hydroxide ions (OH-)
have a sour taste and corrosive.
Bases - ANSWER -a solution that contains more hydroxide ions (OH-) than
hydronium ions (h3o+)
they have bitter taste and feel slippery.
buffer - ANSWER -a chemical substance that neutralize small amounts of either
an acid or base.
Litmus paper - ANSWER -an indicator paper that turns red in an acid and blue in
a base
Position - ANSWER -where an object is located in space
Displacement - ANSWER -difference between the initial and straight from the
beginning point to the end.
the position from start or the net change in position of an object in motion
Distance - ANSWER -an objects total movement.
the total amount of ground covered byan object in motion
Speed - ANSWER -the rate at which an object is able to move or operate. It is the
distance traveled per unit of time.
s=d/t
, velocity - ANSWER -the rate of speed in a certain directions; it measures how
fast an object gets somewhere. calculated by dividing distance travelebed in meters
or seconds.
v=d/t
acceleration - ANSWER -when velocity of an object changes,, an object which is
slowing down is expereinces a negative acceleration or deceleration.
acceleration (a)= v/t
First Law of Motion - ANSWER -1) an object moving will keep moving
2) if an object is at rest, it will stay at rest unless acted on by an unbalanced force.
Inertia - ANSWER -the tendency of an object in motion to remain in motion.
ex: Jenga
Newton's second law of motion - ANSWER -the acceleration of an object is in the
same direction as the net force on the object and can be calculated in a few ways.
F=ma
f=force
m=mass
a=acceleration
Newton's third law of motion - ANSWER -to every action force, there is an equal
and opposite reaction.
ex: when you jump on a trampoline you exert a downward force while the
trampoline exerts an upward force.
Force - ANSWER -a push or pull
Gravity - ANSWER -A force that pulls objects toward each other. pulls down
towards the earth.
Friction - ANSWER -works opposite the direction of motion.
ex: A ball thrown upwards has downward frictional force. when the ball begins to
fall down the frictional force becomes an upwards force.
Attractions - ANSWER -occur between the north and south poles of magnet and
between positive and negative electrical charges.