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Introduction To Matter Review
Test Description: Unit 7 Test Review
Instructions: Answer all questions to get your test result.
1) Sugar is an example of a(n)
A
atom
B
element
C
mixture
D
compound
2) A pure substance that cannot be broken down chemically into another substance is known as
A
a heterogeneous mixture.
B
an element.
C
a homogeneous mixture.
D
a compound.
3) Salt dissolving in a glass of water is known as a
A
condensation.
B
recombination.
C
physical change.
D
chemical change.
4) Sweet tea and lemonade would be considered
A
compounds.
B
homogeneous mixtures.
C
elements.
D
heterogeneous mixtures.
5) Boiling point, melting point, and freezing point are all considered to be
A
physical properties.
B
chemical properties.
C
all the same temperature.
D
not important to phase changes.
6) Burning of methane gas produces water and carbon dioxide to cause a
A
heterogeneous mixture.
B
physical change.
C
homogeneous mixture.
D
chemical change.
7) Which chemical formula represents a molecule and a chemical compound? (assume the numbers are subscripts)
A
O2
B
Pb
C
N2
D
H2O
8) Which of the following formulas represent a molecule but not a compound? (assume the numbers are subscripts)
A
H2O
B
O2
C
C6H12O6
D
He
9) Vinegar and baking soda combining to form a salt and wate
A
chemical change.
B
homogeneous mixture.
C
physical change.
D
heterogeneous mixture.
10) According to Boyle's Law, when the pressure of a gas increases
A
the volume will decrease.
B
the temperature will increase.
C
the temperature will decrease.
D
the volume will increase.
11) The length of a cube is 5 cm. What is the density of the cube if it's mass is 5 g?
A
1 g/cm3
B
25 g/cm3
C
0.2 g/cm3
D
5 g/cm3
12) Which phase change is exothermic?
A
vaporization
B
condensation
C
melting
D
sublimation
13) According to Charles' Law, when the temperature of a gas decreases
A
the pressure decreases as well.
B
the volume decreases as well.
C
the pressure increases.
D
the volume increases.
14) During sublimation
A
a solid turns to a liquid.
B
solid turns to a gas.
C
a plasma turns to a gas.
D
a gas turns to a solid.
15) If balloons exposed to hot hair expand, according to Charles' Law a balloon exposed to cold air will
A
decrease in size.
B
increase in size.
C
stay the same size.
D
pop.
*select an answer for all questions
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