Theory of Plate Tectonics

Front

What is Pangaea?

Back

Pangaea was a supercontinent that existed around 250 million years ago, where all the continents were joined together.

Front

What is a mid-ocean ridge?

Back

A mid-ocean ridge is an underwater mountain range formed by plate tectonics, where tectonic plates are moving apart.

Front

What is a convergent boundary?

Back

A convergent boundary is where two tectonic plates collide, often forming mountains or trenches.

Front

What land feature is formed at a convergent boundary?

Back

Mountains are often formed at convergent boundaries due to the collision of tectonic plates.

Front

What is subduction?

Back

Subduction is the process where one tectonic plate moves under another plate and sinks into the mantle.

Front

Which type of crust is denser: oceanic or continental?

Back

Oceanic crust is denser than continental crust.

Front

What is a divergent boundary?

Back

A divergent boundary is where two tectonic plates move away from each other, often creating new crust.

Front

What land feature is formed at a divergent boundary?

Back

A rift valley is formed at a divergent boundary.

Front

What is the role of convection currents in plate tectonics?

Back

Convection currents in the mantle drive the movement of tectonic plates.

Front

What evidence supports the theory of plate tectonics?

Back

Evidence includes the fit of continents, fossil distribution, and the presence of mid-ocean ridges.