Unit 7: Plate Tectonics

Front

What is Plate Tectonics?

Back

The theory that explains the movement of the Earth's lithosphere, which is divided into tectonic plates that float on the semi-fluid asthenosphere.

Front

What is Continental Drift?

Back

The hypothesis that continents have moved over geological time and were once joined together in a single landmass.

Front

What evidence supports the theory of Continental Drift?

Back

Fossil distribution, glacial striations, matching geological formations, and the shapes of continents.

Front

What are convergent boundaries?

Back

Boundaries where two tectonic plates collide, often forming mountains or causing volcanic activity.

Front

What landforms are created at convergent boundaries?

Back

Folded mountains, volcanic arcs, and deep ocean trenches.

Front

What are divergent boundaries?

Back

Boundaries where two tectonic plates move apart, leading to the formation of new crust, such as mid-ocean ridges.

Front

What is a transform boundary?

Back

A boundary where two tectonic plates slide past each other, causing earthquakes.

Front

What do V-patterns on a topographic map indicate?

Back

They represent valleys carved by rivers.

Front

What is the significance of glacial striations in supporting Continental Drift?

Back

They show the historical movement of glaciers, indicating that continents were once connected.

Front

How do fossils provide evidence for Plate Tectonics?

Back

Similar fossils found on different continents suggest that these continents were once joined.