What do S-waves tell us about Earth's outer core?
Correct answer: D. That it is liquid, because S-waves cannot travel through it
- A. That it is made of iron only
- B. That it is the hottest layer
- C. That it is solid
- D. That it is liquid, because S-waves cannot travel through it
Explanation
The S-wave shadow zone proved the outer core is liquid, since S-waves stop there.
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