Wegener's Continental Drift Evidence

The video lesson explores Alfred Wegener's theory of continental drift, which posits that Earth's continents were once a single supercontinent called Pangaea and have since drifted apart. The lesson discusses various pieces of evidence supporting this theory, including fossil distribution, climate clues like glacial grooves, the puzzle-like fit of continents, and matching rock compositions across continents. Despite the compelling evidence, Wegener's theory was initially rejected due to the lack of a mechanism explaining the drift, only gaining acceptance decades later.

What was the name of the supercontinent proposed by Alfred Wegener?

• Atlantis

• Pangaea

• Gondwana

• Laurasia

Which fossil was crucial in suggesting that South America and Africa were once connected?

• Mesosaurus

• Lystrosaurus

• Glossopteris

• Cynognathus

Why was the presence of Lystrosaurus fossils significant in supporting continental drift?

• They were found on continents that are now widely separated.

• They were aquatic reptiles.

• They were capable of long-distance swimming.

• They were found only in Antarctica.

What challenge did the distribution of Glossopteris pose to the idea of separate continents?

• Its seeds could not travel across oceans.

• It was found only in the northern hemisphere.

• It was a marine plant.

• It thrived in cold climates.

What evidence did Wegener use from the climate to support his theory?

• Glacial grooves on continents

• Volcanic activity patterns

• Desert formations

• Rainforest distribution

How did the shape of the continents support Wegener's theory?

• They fit together like puzzle pieces.

• They had identical coastlines.

• They formed a perfect circle.

• They were all the same size.

Which mountain ranges did Wegener use as evidence for continental drift?

• Himalayas and Andes

• Rockies and Alps

• Appalachians and Caledonian

• Urals and Pyrenees

What was a major reason Wegener's theory was initially rejected?

• Inaccurate maps

• Lack of fossil evidence

• Inability to explain the mechanism of movement

• Contradictory climate data

What did Wegener conclude about the age of mountain ranges on different continents?

• They were older than the continents.

• They were younger than the continents.

• They were formed at different times.

• They were the same age.

What did Wegener find about rock composition on opposite coastlines?

• They were unrelated.

• They were similar but not identical.

• They were identical.

• They were completely different.