Georgia Science Grade 8

Chapter 13: Energy and Energy Resources

CRCT Practice

1
The kinetic energy of a moving object increases if which happens?
A)Its mass decreases.
B)Its speed increases.
C)Its height above the ground increases.
D)Its temperature increases.
2
By about how many times did global energy use increase from 1970 to 2000?

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A)1.5 times
B)2 times
C)3 times
D)4 times
3
Which energy source is being used faster than it can be replaced?
A)tidal
B)wind
C)fossil fuels
D)hydroelectric
4
The graph shows the sources of electrical energy in the United States. Large amounts of energy are measured in units called quads. In 2002, the total amount of electrical energy produced in the United States was 38.2 quads. How much of this energy was produced by nuclear power plants?

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A)3.0 quads
B)3.8 quads
C)7.6 quads
D)35.1 quads
5
A softball player hits a fly ball. Which describes the energy conversion that occurs as the ball falls from its highest point?
A)kinetic to potential
B)potential to kinetic
C)thermal to potential
D)thermal to kinetic
6
When chemical energy is converted into thermal energy, which is true?
A)The total amount of energy changes.
B)Only the amount of chemical energy changes.
C)Only the amount of thermal energy changes.
D)The total amount of thermal energy plus chemical energy does not change.
7
Approximately how many times greater was oil production in 1970 than in 1950?

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A)2 times
B)10 times
C)6 times
D)3 times
8
In which year will global oil production be the greatest?

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A)1974
B)2002
C)2010
D)2050
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