The refraction and shadow patterns of seismic P-waves and S-waves indicate the dimensions and properties of Earth's layers.

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Quizplus · Accepted Answer

This statement is true. Seismic waves, including P-waves and S-waves, travel through Earth's layers and change speed and direction as they encounter different materials. This causes the waves to refract and create shadow zones, which can be detected by seismic sensors. By studying the pattern of refraction and shadow zones, scientists can infer the dimensions and properties of Earth's layers.

The Refraction and Shadow Patterns of Seismic P-Waves and S-Waves