Primary waves travel ____ as fast as secondary waves.
A) half
B) twice
C) three times
D) at the same speed

Name: Primary waves travel ____ as fast as secondary waves. A) half B) twice C) three times D) at the same speed
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Although the primary and secondary waves are generated at the same time, primary waves move faster than the secondary waves. Their behavior through the Earth's interior affects their speed. Information can be found in the section The Study of Earthquakes Provides Evidence of Layering.

Primary Waves Travel ____ as Fast as Secondary Waves