Part if molten rock at mid-ocean ridges.

New oceanic lithosphere forms as a result of

Items that provide evidence that the continents were once closer together

Wegner thought that all the continents were once together in one large continent called

Process that takes place at mid-ocean ridges

Hypothesis that states that the continents were once one large mass that broke apart

Process of Earth's magnetic poles changing places

Evidence for sea-flooring spreading

Two plate coming together

Plate moving apart

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