science chapter 2-3 multiple choice Flashcards
which of the following are pure substances A. solutions B. compounds C. homogenous mixtures D. colloids
compounds
which of the following is a NOT a pure substance A. milk B. oxygen C. water D. carbon dioxide
milk
a substance that is made up of only one kind of atom A. compound B. homogenous mixture C. element D. solution
element
that is the symbol for aluminum A. AL B. Al C. Au D. A
Al
the symbol for gold is... A. Au B. Al C. GI D. Go
Au
water is a compound because it…
A. can be broken down into simpler substances
B. always has two hydrogen atoms for each oxygen atoms
C. is made of water atoms joined together
D. both A and B
both A and B
which of the following is a heterogenous mixture... A. water in a swimming pool B. sugar water C. a jar of mixed nuts D. stainless steel
a jar of mixed nuts
which of the following is a mixture... A. carbon dioxide B. silicon C. silicon dioxide D. sand
sand
a mixture can be classified as a solution, suspension, or colloid based on the.... A. number of particles it contains B. size of its largest particles C. color of its particles D. size of its smallest particles
size of its largest particles
you are about to open a container of soy milk, but notice that there are instructions to "shake well before serving" The soy milk is most likely a.... A. solution B. pure substance C. colloid D. suspension
suspension
which of the following has the highest viscosity... A. corn syrup B. milk C. water D. orange juice
corn syrup
a substance has a melting point of 0 degrees C and a boiling point of 100 degrees C the substance is most likely.... A. water B. hydrogen C. gold D. table salt
water
a material that is malleable and conducts electricity is most likely... A. wood B. ice C. a metal D. motor oil
a metal
filtration can be used to separate mixtures based on... A. their boiling points B. their densities C. their melting points D. the size of their particles
the size of their particles
when a physical change in a sample occurs, which of the following does NOT change... A. shape B. volume C. temperature D. composition
composition
which of the following is a physical change…
A. sawing a piece of wood in half
B. burning a piece of wood
C. rust forming on an iron fence
D. a copper roof changing color from red to green
sawing a piece of wood in half
flammability is a materials ability to burn in the presence of... A. hydrogen B. nitrogen C. oxygen D. carbon dioxide
oxygen
a substance that has high reactivity... A. easily combines chemically with other substances B. burns in the presence of water C. displaces dissolved oxygen D. has a high boiling point
easily combines chemically with other substances
which of the following is NOT a clue that a chemical change has occurred? A. change in color B. production of gas C. formation of a precipitate D. change in shape
change in shape
which of the following is a chemical change…
A. ice melting
B. ice being carved
C. water boiling
D. water breaking down into hydrogen and oxygen
water breaking down into hydrogen and oxygen
a gas has…
A. a definite shape but no definite volume
B. a definite volume but no definite shape
C. no definite shape or definite volume
D. a definite volume and definite shape
no definite shape or definite volume
99% of all the matter that can be observed in the universe exists as... A. gases B. plasmas C. liquids D. solids
plasmas
matter that has a definite volume but no definite shape is a... A. liquid B. solid C. gas D. plasma
liquid
in which of the substances in figure 3-1 are the forces attraction among the particles so weak that they can be ignored under ordinary conditions... A. substance A B. substance B C. substance C D. all of the above
substance C
forces of attraction limit the motion of particles most in... A. a solid B. a liquid C. a gas D. both b and c
a solid
what is the result of a force distributed over an area? A. temperature B. volume C. pressure D. mass
pressure
collisions of helium atoms with the walls of a closed container cause... A. condensation B. gas pressure C. a decrease in volume D. and overall loss of energy
gas pressure
which of the following will cause a decrease in gas pressure in a closed container?
A. increase
B. decrease
C. remain constant
D. cause a decrease in the average kinetic energy of the particles
increase
which of the following will cause a decrease in as pressure in a closed container? A. lowering the temperature B. reducing the volume C. adding more gas D. both a and b
lowering the temperature
what type of change occurs when water changes from a solid to a liquid? A. a phase change B. a physical change C. an irreversible change D. both a and b
both a and b
the phase change that is revise of condensation is... A. freezing B. sublimation C. vaporization D. melting
vaporization
during a phase change, the temperature of a substance... A. increases B. decreases C. does not change D. increases or decreases
does not change
if a solid piece of naphthalene is heated and remains at 80 degrees C until it is completely melted, you know that 80 degrees C is the... A. freezing point of naphthalene B. melting point of naphthalene C. boiling point of naphthalene D. both a and b
both a and b
during which phases change doe the arrangement of water molecules become more orderly? A. melting B. freezing C. boiling D. condensing
freezing
the phase change in which a substance changes from a liquid to a gas is... A. deposition B. sublimation C. condensation D. vaporization
vaporization
the phase change in which a substance changes from a solid to a liquid is... A. freezing B. melting C. sublimation D. condensation
melting
the phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is... A. sublimation B. deposition C. vaporization D. melting
deposition
the phase change in which a substance changes from a gas directly to a solid is... A. condensation B. vaporization C. deposition D. sublimation
deposition
