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Easy Deepest Oceans

The Kermadec Trench lies northeast of which country's North Island?

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Easy Deepest Oceans

In what year did HMS Challenger record its deep sounding at station 225?

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Easy Deepest Oceans

Which British expedition first located the depression later called Challenger Deep?

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Easy Deepest Oceans

How many sediment-filled basins make up Challenger Deep?

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Easy Deepest Oceans

What plate-tectonic process forms most deep ocean trenches?

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