Ch 5 Lesson 1 Continental Drift Theory

Front

What is the Continental Drift Theory?

Back

The Continental Drift Theory is the idea that continents were once joined together in a single landmass called Pangaea and have since drifted apart over millions of years.

Front

Who proposed the Continental Drift Theory?

Back

Alfred Wegener proposed the Continental Drift Theory in the early 20th century.

Front

What is Pangaea?

Back

Pangaea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, where all the continents were joined together.

Front

What type of evidence did Wegener use to support his theory?

Back

Wegener used evidence such as matching coastlines, similar rock formations, fossil evidence, and climate evidence.

Front

What is fossil evidence in the context of continental drift?

Back

Fossil evidence refers to the discovery of similar fossils on different continents, suggesting that these continents were once connected.

Front

What is glacier scarring?

Back

Glacier scarring is the marking left on the land by glaciers, which can provide evidence of past climate conditions and continental movement.

Front

What does the term 'plate tectonics' refer to?

Back

Plate tectonics is the scientific theory that describes the large-scale movement of Earth's lithosphere, which is divided into tectonic plates.

Front

How did Wegener explain the distribution of plant fossils?

Back

Wegener explained that plant fossils found in places like Antarctica indicate that these continents were once located in warmer climates.

Front

What is the significance of matching mountain ranges across continents?

Back

Matching mountain ranges across continents suggest that these landmasses were once connected and have since drifted apart.

Front

What is the role of climate evidence in supporting continental drift?

Back

Climate evidence, such as glacial deposits in warm regions, supports the idea that continents have moved to different climates over time.