3
QuizMultiple Choice

Earth's Interior

Question 3 • Earth and Space A 26-27

Which object can an S wave travel through?

Answer
a
air
m
magma
s
soil
w
water

Explanation

S waves are shear waves: they move material side to side and require a solid that can resist shearing. Soil is the only solid listed. Air and water are gases or liquids, and magma is molten rock, so they cannot transmit S waves in the usual way.

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