COS Exam 1 UPDATED ACTUAL Exam
Questions and CORRECT Answers
density is what kind of property - CORRECT ANSWER - physical
define physical property - CORRECT ANSWER - a characteristic that can be observed or
measured without changing the identity of the substance
melting point - CORRECT ANSWER - when temperature causes a solid to turn into a
liquid
chemical property - CORRECT ANSWER - breaking or making bonds
CER - CORRECT ANSWER - question, procedure, claim, evidence, reason
what are some things that temperature affects? - CORRECT ANSWER - buildings,
bridges, railroad tracks
you begin to see a crack in your driveway, what kind of property is this? - CORRECT
ANSWER - physical property
atom - CORRECT ANSWER - Smallest particle of an element
subatomic particles - CORRECT ANSWER - protons, neutrons, electrons
what is the goal of of different atoms interacting via electrons? - CORRECT ANSWER -
stability
covalent bond - CORRECT ANSWER - two atoms share one or more pairs of electrons
, ionic bond - CORRECT ANSWER - two negatively charged ions attracted
ion - CORRECT ANSWER - An atom or group of atoms that has a positive or negative
charge.
unstable atom - CORRECT ANSWER - An atom with an incomplete outer energy level.
stable atom - CORRECT ANSWER - has a full outer electron level
elements - CORRECT ANSWER - a molecule composed of one kind of atom
compound - CORRECT ANSWER - substance formed by the chemical combination of
two or more elements (in definite proportions)
what is absolute temp - CORRECT ANSWER - 0 K/ -273.15 C
cohesion - CORRECT ANSWER - likes each other, same tupe
adhesian - CORRECT ANSWER - likes each other, different type
Solubility - CORRECT ANSWER - attraction between particles of different kinds
polarity - CORRECT ANSWER - Molecules having uneven distribution of charges
exothermic - CORRECT ANSWER - Releases heat
endothermic - CORRECT ANSWER - Absorbs heat
Questions and CORRECT Answers
density is what kind of property - CORRECT ANSWER - physical
define physical property - CORRECT ANSWER - a characteristic that can be observed or
measured without changing the identity of the substance
melting point - CORRECT ANSWER - when temperature causes a solid to turn into a
liquid
chemical property - CORRECT ANSWER - breaking or making bonds
CER - CORRECT ANSWER - question, procedure, claim, evidence, reason
what are some things that temperature affects? - CORRECT ANSWER - buildings,
bridges, railroad tracks
you begin to see a crack in your driveway, what kind of property is this? - CORRECT
ANSWER - physical property
atom - CORRECT ANSWER - Smallest particle of an element
subatomic particles - CORRECT ANSWER - protons, neutrons, electrons
what is the goal of of different atoms interacting via electrons? - CORRECT ANSWER -
stability
covalent bond - CORRECT ANSWER - two atoms share one or more pairs of electrons
, ionic bond - CORRECT ANSWER - two negatively charged ions attracted
ion - CORRECT ANSWER - An atom or group of atoms that has a positive or negative
charge.
unstable atom - CORRECT ANSWER - An atom with an incomplete outer energy level.
stable atom - CORRECT ANSWER - has a full outer electron level
elements - CORRECT ANSWER - a molecule composed of one kind of atom
compound - CORRECT ANSWER - substance formed by the chemical combination of
two or more elements (in definite proportions)
what is absolute temp - CORRECT ANSWER - 0 K/ -273.15 C
cohesion - CORRECT ANSWER - likes each other, same tupe
adhesian - CORRECT ANSWER - likes each other, different type
Solubility - CORRECT ANSWER - attraction between particles of different kinds
polarity - CORRECT ANSWER - Molecules having uneven distribution of charges
exothermic - CORRECT ANSWER - Releases heat
endothermic - CORRECT ANSWER - Absorbs heat
