Plate Tectonics #1

Front

What are the two types of crust in plate tectonics?

Back

Oceanic crust and continental crust.

Front

What is a convergent boundary?

Back

A tectonic plate boundary where two plates collide, often forming mountains or causing subduction.

Front

What is a divergent boundary?

Back

A tectonic plate boundary where two plates move away from each other, often resulting in the formation of new crust.

Front

What is subduction?

Back

The process by which one tectonic plate moves under another plate and sinks into the mantle.

Front

What geologic feature is commonly found at divergent boundaries?

Back

Mid-Ocean Ridge.

Front

What evidence did Alfred Wegener use to support his theory of continental drift?

Back

Fossils of land mammals found on different continents, glacier scars, and mountain ranges that align across continents.

Front

Which type of crust is always subducted?

Back

Oceanic crust.

Front

What is the result of a convergent boundary between oceanic and continental crust?

Back

Formation of volcanic mountains.

Front

What is the main driving force behind plate tectonics?

Back

Convection currents in the Earth's mantle.

Front

What is an island arc?

Back

A chain of volcanic islands formed at a convergent boundary between two oceanic plates.