over the last 250 million years, the world changed from a single land mass to a number of different continents. One reason for the change is expanding ocean floors. What causes ocean floors to expand?

asked Feb 12, 2019 231k views

4 votes

by Nicq

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3 votes

It is caused by tectonic plates and the stress that is put on them

Aacotroneo answered Feb 19, 2019

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