Plate Tectonics 4.2 Flashcards Preview

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Flashcards in Plate Tectonics 4.2 Deck (5)
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Continental drift

The hypothesis that states that the continents once formed a single land mass, broke up, and drifted to their present locations

1

Pangaea

Alfred Wegeners idea that all the continents were joined in one single, huge continent.

2

Mid-Ocean Ridges

Places where sea floor spreading takes place

3

Sea floor spreading

The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.

4

Magnetic reversal

When earths magnetic poles change places. Evidence of sea floor spreading comes from magnetic reversals.