Continental drift theory

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What is the Continental Drift Theory?

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The theory that continents were once joined together to form a supercontinent called Pangaea and have since drifted apart to their current locations.

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What evidence supports the Continental Drift Theory?

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Similar fossil records, glacial scars, and matching geological features found on different continents.

Front

What is Pangaea?

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A supercontinent that existed around 250 million years ago, where all continents were joined together.

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What layer of the Earth is responsible for the movement of tectonic plates?

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The mantle, which flows slowly and causes the crust to move.

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Who proposed the Continental Drift Theory?

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Alfred Wegener.

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What are glacial grooves?

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Scratches or scars left on rocks by glaciers, indicating past glacial activity.

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How do similar fossils across continents support the theory?

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Fossils of the same species found on different continents suggest that these continents were once connected.

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What is the significance of matching geological features on different continents?

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It indicates that continents were once part of a larger landmass and have since drifted apart.

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What is the role of tectonic plates in continental drift?

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Tectonic plates are large sections of the Earth's crust that move and interact, causing continents to drift.

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What is sea-floor spreading?

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The process by which new oceanic crust is formed at mid-ocean ridges and pushes older crust away, contributing to continental drift.