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8th Grade Key Vocabulary --Classifying Matter Part 1
Test Description: This is practice on terms for elements, compounds mixtures.
Instructions: Answer all questions to get your test result.
1) Pure Substance--example
A
solution
B
suspension
C
colloid
D
element
2) Pure Substance--definition
A
substances that are made of various elements or compounds that are physically mixed
B
substance that can only be separated chemically
C
substance made of mostly sand and rocks
D
substance that have been mixed together and can be easily separated
3) What is a mixture?
A
Substances, such as silver and gold, that are made of the same type or types of elements.
B
Two or more substances having been mixed together, not chemically bonded, and can be separated
C
Only two substances that come together and combine chemically and cannot be easily separated.
D
Substance that has combined chemically in a fixed ratio.
4) A homogeneous mixtures occur when
A
the substances in a mixture are easily seen.
B
the subtances of the mixture contain water.
C
the substances of the mixture settle at the bottom of a container.
D
the subtances of the mixture appear to contain one substance throughout the mixture.
5) Solution can be defined as
A
a substance that has the same type of atoms spread evenly throughout the substance.
B
when two or more elements chemically combine to form a third substance
C
a mixture that forms when substances dissolve and form a homogeneous mixture
D
a mixture that forms when two solids (peas and carrots) are mixed together
6) Solute is
A
a substance whose particles are dissolved in a solution
B
the substance in which another substance dissolves in
C
a substance which is made of the same type of atoms
D
a substance that forms when 2 or more elements chemically combine in a fixed ratio
7) Heterogeneous Mixtures are mixtures where
A
parts of the mixture are noticeably different from one another; more than one substance in the mixture can be seen.
B
the substances in the mixture are spread evenly throughout, and only one substance appears to be seen.
C
two or more elements chemically combine in a fixed ratio.
D
the mixed substances are made of the same type of atoms.
8) Suspension is a mixture that is
A
a homogeneous and only one substance appears to be seen.
B
only found in elements.
C
a heterogeneous mixture that separates into layers over time.
D
only separated by chemical means.
9) When something is SOLUBLE
A
it is a compound that is quite explosive.
B
it is a rare element at room temperature.
C
it doesn't dissolve in a liquid.
D
it easily dissolves in a liquid.
10) When someting is INSOLUBLE
A
it is a compound that is quite explosive.
B
it doesn't dissolve in a liquid.
C
it easily dissolves in a liquid.
D
it is a rare element at room temperature.
11) Miscible can be defined as
A
when two or more elements chemically combine to form a third substance.
B
a substance that has the same type of atoms spread evenly throughout the substance.
C
when two liquids form a homogeneous solution when mixed together.
D
when two liquids form a hetereogeneous solution when mixed together.
12) Immiscible can be defined as
A
when two liquids form a hetereogeneous solution when mixed together.
B
when two liquids form a homogeneous solution when mixed together.
C
when two or more elements chemically combine to form a third substance.
D
a substance that has the same type of atoms spread evenly throughout the substance.
13) Filtration is a type of separation that
A
allows two substances to settle and separate by gravity.
B
is based on the substances freezing points.
C
is based on the substances boiling points.
D
is based on the size of a substances particles.
14) Distillation is a type of separation that
A
is based on the size of a substances particles.
B
allows two substances to settle and separate by gravity.
C
is based on the substances boiling points.
D
is based on the substances freezing points.
15) Decanting is a type of separation that
A
is based on the size of a substances particles.
B
is based on the substances freezing points.
C
allows two substances to settle and separate by gravity.
D
is based on the substances boiling points.
*select an answer for all questions
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