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2 September, 01:36

During the process of seafloor spreading Choose one:

A. seafloor is neither formed nor destroyed but spreads apart at ridges.

B. new seafloor is formed at ridges and destroyed at trenches.

C. seafloor is neither formed nor destroyed and total seafloor volume stays constant.

D. new seafloor is formed at trenches and destroyed at ridges.

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  1. 2 September, 02:05
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    B. New sea floor is formed at ridges and destroyed at trenches

    Ridges are where the mantle is pushed upwards and solidifies to form new sea floor, and trenches are where the floor sinks back down and is melted back into the mantle.
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