scientists once thought that the features of the Earth’s surface were the result of...
the shrinking of the crust as the Earth cooled down following its formation
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Waht did Alfred Wegener come across?
Wegener came across some work listing the fossils of very similar plants and animals which had been found on opposite sides of the Atlantic ocean
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He investigated further and found ...
other cases of very similar pfossils on opposite sides of oceans.
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What else did Wegener notice?
that the coastlines od Africa and South America seemed to fit together like a jigsaw.
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He woondered...
if these two continenets had once been one continent that split.
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He started looking for more evidenc and found...
matching layers in the rocks in different continents
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Wegener published his theory of..
"continental drift" in 1915
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His theort stated that...
there had jsut been one supercontinent which broke into smaller chinks which moved apart. He claimed these chunks are now our modern day continents and are slowly drifting apart.
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Other scientists...
diasgreed with Wegener becauseof many reasons.
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These reasons...
one scientist calculated that the forces need to move the continents like this would also have stopped the Earths rotation. Wegener had used inaccurate data in his calculations, so he'd made some wild predictions about how fast the continents move.
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Another reason...
He wasn't a proper geologist. He studied astronomy
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Other cards in this set
Card 2
Front
Waht did Alfred Wegener come across?
Back
Wegener came across some work listing the fossils of very similar plants and animals which had been found on opposite sides of the Atlantic ocean
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