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What's inside Earth quiz: Test your knowledge of our planet's hidden layers

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Summary
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65% Informative

Seismic waves are shock waves that propagate through Earth 's layers after an earthquake or explosive event.

The time it takes for these shock waves to bounce back up to Earth 's surface reveals aspects of the composition and physical properties of the rocks beneath.

Geologists today have a good understanding of Earth 's interior, based on pioneering work by Isaac Newton and Danish seismologist Inge Lehmann .

Find out by taking this quiz.

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81

Informative language

89

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36

Article tone

semi-formal

Language

English

Language complexity

43

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not offensive

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not hateful

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Time-value

long-living

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