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Question
To map the Earth's interior, we rely on ________ waves created by earthquakes.Answer
This answer is hidden. It contains 7 characters.
Related questions
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A) a star a day
B) a star a month
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How long ago did multicellular life forms appear in the fossil record?
A) 4.5 billion years ago
B) 3.8 billion years ago
C) one billion years ago
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