ACT Science Practice Question #1488 (Medium (32)) | Test Citadel
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ACT Science Difficulty: Medium (32)

Digital ACT Science Practice Question #1488

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A geophysics team studied seismic P-waves (compressional) and S-waves (shear) traveling through Earth's interior: - P-waves travel through both solids and liquids. - S-waves travel ONLY through solids. - Beyond 140° from an earthquake epicenter, P-waves are detected, but S-waves are completely absent. The complete absence of direct S-waves beyond 140° provides direct evidence that Earth's outer core is:
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Socratic AI Engine Step-by-Step Derivation
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⚡ 15-Second Desmos Speed Hack

S-waves cannot travel through liquids -> liquid outer core.

Masterclass Solution & Distractor Trap Analysis

S-waves cannot propagate through liquids. Their absence beyond 140° proves the outer core is liquid....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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