Restless Continents

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Evidence for sea-floor spreading

Plate Tectonics explains

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

part of molten rock at mid-ocean ridges

New oceanic lithosphere forms as a result of

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

process that takes place as mid-ocean ridges

process of Earth's magnetic poles changing places