Georgia Science Grade 8

Chapter 5: Properties and Changes of Matter

CRCT Practice

1
According to the table, what is the mass of a 6.37-cm3 sample of iron?

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A)0.809 g
B)1.24 g
C)7.87 g
D)50.1 g
2
According to the table, what is the volume of a 25.1 g piece of silver?

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A)8.25 cm3
B)2.39 cm3
C)5.73 cm3
D)3.46 cm3
3
During an experiment, you measure the mass of an unknown substance as 28.4 g and its volume as 2.5 cm3. Use the table above to determine the most likely identity of the unknown substance.
A)zinc
B)magnesium
C)lead
D)iron
4
Which of the following properties is a sizeindependent property?
A)state
B)length
C)mass
D)volume
5
Which of the following statements best explains why the nails in the photograph rusted?

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A)The nails drew rust from the air.
B)Iron in the nails changed into other elements.
C)The rust formed when iron mixed with oxygen and moisture in the air.
D)A temperature change drew rust out of the nails.
6
Which of the following best describes rust?

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A)reversible physical change
B)irreversible physical change
C)reversible chemical change
D)irreversible chemical change
7
Which of the following terms describes a substance with a pH of 7?
A)acidic
B)neutral
C)basic
D)bitter
8
Which of the following describes a chemical change?
A)water freezing into ice
B)a match burning
C)dew forming on a leaf
D)magnetization of an iron nail
9
The density of a 30-g sample of gold is 19.3 g/cm3. What is the density of a 90-g sample?
A)6.43 g
B)19.3 g
C)57.9 g
D)79.3 g
10
What is the density of a 25.3-g sample of quartz that has a volume of 9.55 cm3?
A)0.38 g/cm3
B)242 g/cm3
C)2.65 g/cm3
D)3.00 g/cm3
11
The density of stainless steel is 8.02 g/cm3. What is the volume of a 9.25 g piece of stainless steel?
A)1.15 cm3
B)1.15 g
C)0.87 cm3
D)0.87 g
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