Focus On Earth Science: California Grade 6

Lesson 3: Measuring Earthquakes

Standards Check

1.
The distance from the epicenter of an earthquake to a seismograph is determined by measuring _______. 1.g
A)the arrival times of primary and secondary waves
B)the arrival times of surface waves
C)the magnitudes of primary and secondary waves
D)the magnitudes of surface waves
2.
Usually the closer _______ is to the surface, the stronger the earthquake will be. 1.g
A)the liquefaction
B)the epicenter
C)shadow zone
D)the focus
3.
An increase of one unit on the magnitude scale means that the amount of energy released increases by a factor of _______. 1.g
A)30
B)10
C)1,000,000
D)1,000
Grade 6
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