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