Warm-up: Continental Drift

Front

What is the theory of Continental Drift?

Back

The theory of Continental Drift proposes that continents have moved over geological time from a single supercontinent called Pangaea to their current positions.

Front

Who proposed the theory of Continental Drift?

Back

Alfred Wegener, a German scientist, proposed the theory of Continental Drift in the early 20th century.

Front

What was a major criticism of Wegener's theory?

Back

A major criticism was that Wegener could not explain the mechanism by which continents moved.

Front

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

Back

Wegener used evidence from fossil distribution, geological formations, and climatic evidence to support his theory.

Front

What are the two types of Earth's crust?

Back

The two types of Earth's crust are continental crust (thicker and less dense) and oceanic crust (thinner and more dense).

Front

Where did Wegener find fossils of plants that could not survive in their current locations?

Back

Wegener found plant fossils in Antarctica that today would not be able to survive in that environment.

Front

What is the significance of the fossil evidence in supporting Continental Drift?

Back

Fossil evidence shows that similar species existed on continents that are now widely separated, suggesting they were once connected.

Front

What geological features can provide evidence for Continental Drift?

Back

Geological features such as mountain ranges, rock formations, and the alignment of coastlines can provide evidence for Continental Drift.

Front

How does the concept of plate tectonics relate to Continental Drift?

Back

Plate tectonics is the modern theory that explains the movement of the Earth's lithosphere, which includes the mechanisms behind Continental Drift.

Front

What is Pangaea?

Back

Pangaea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, from which the current continents eventually separated.