Download D - MrsMackScience

Mrs. Mack
8th Grade
Science
A new substance is formed ___________
A: During a physical
B:
During a chemical
change
D:
In an element
change
C: In a mixture
During a
chemical
change
B
A chemical reaction in which energy is
absorbed is a(n):
A: Colloid
B:
catalyst
C: Exothermic reaction
D:
Endothermic reaction
Endothermic
reaction
D
What is a substance that cannot be broken
down into any other substances by
chemical or physical means?
A: A colloid
B:
A substance
C: A solution
D:
An element
An element
D
The fact that matter is not created or destroyed in
any physical or chemical change is:
A: chemistry
B:
Law of reactions
C: Law of conservation of
D:
A catalyst
mass
Law of
conservation
of mass
C
What are the properties of an acid?
Sour taste, pH 0-6.9,
A: feels slippery, turns
red litmus paper blue
Sour taste, pH 7.0,
reacts with metals,
B: turns blue litmus paper
red
Bitter taste, pH 0-6.9,
reacts with metals,
C: turns red litmus paper
blue
Sour taste, pH 0-6.9,
reacts with metals,
D: turns blue litmus paper
red
Sour taste, 0-6.9,
reacts with metals,
turns blue litmus
paper red
D
When left in the open air, liquid solutions can
change to gas, leaving solid components
behind. What method of separating mixtures is this?
A: evaporation
B:
distillation
C: Magnetic attraction
D:
filtration
Evaporation
A
Which of the following is not a pure substance?
A: Distilled water
B:
oxygen
C: air
D:
Carbon dioxide
Air
C
Which method of separating mixtures would you
Use to separate salt from a saltwater solution?
A: Magnetic attraction
B:
Filtration
C: Distillation
D:
Evaporation
Filtration
B
A piece of paper was burned and became a
pile of ashes. The mass of the ashes was less
than the mass of the paper before it was burned.
What can you conclude based on the law of
conservation of mass?
The chemical reaction
The chemical reaction
destroyed matter
A: created matter
B:
The chemical reaction
C: took place in an open
system
The reaction did not
work as expected
D: because it took place in
a closed system.
The chemical
reaction took place
in an open system
C
What is a mixture that is so evenly mixed that
you can’t differentiate the parts simply by
looking at it?
A: Homogeneous mixture
B:
Pure substance
C: Heterogeneous
D:
Pure mixture
mixture
Homogeneous
mixture
A
Some examples of a chemical change are:
Combustion,
A: oxidation,
B:
Combustion,
dissolving, cutting
D:
Oxidation, dissolving,
photosynthesis
photosynthesis
C: Dissolving, crushing,
photosynthesis
Combustion,
oxidation,
photosynthesis
A
Frying an egg is an example of a:
A: solution
B: Physical change
C: Chemical change
D: Mechanical change
Chemical change
C
How does the maximum amount of salt that will
dissolve in a given amount of water change
if the temperature of the water is increased?
A: It increases steadily
B:
It decreases steadily
C: It remains the same
D:
It increases then
decreases
It increases
steadily
A
Blowing into a balloon is an example of a
A: Physical change
B:
Chemical change
C: Mechanical change
D:
Electrical change
Physical
change
A
Factors that can affect chemical
reactions include:
A: Surface area and color
B:
C: Temperature and color
D:
Temperature and
breakability
Surface area and
temperature
Surface
area and
temperature
D
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