8.9B - Crustal Features

Front

What is a transform fault?

Back

A transform fault is a type of fault where two tectonic plates slide past each other horizontally. This movement can cause earthquakes.

Front

What are trenches in the ocean?

Back

Trenches are the deepest parts of the ocean floor, formed by the subduction of one tectonic plate beneath another.

Front

What is a convergent plate boundary?

Back

A convergent plate boundary is where two tectonic plates move towards each other, often resulting in mountain building, earthquakes, or volcanic activity.

Front

What type of geological event is commonly associated with convergent boundaries?

Back

Earthquakes are commonly associated with convergent boundaries due to the intense pressure and friction between the colliding plates.

Front

Where would you find the oldest rocks on the ocean floor?

Back

The oldest rocks are typically found farthest from mid-ocean ridges, often near continental margins.

Front

What is the mid-ocean ridge?

Back

The mid-ocean ridge is an underwater mountain range formed by plate tectonics, where new oceanic crust is created as tectonic plates pull apart.

Front

What is a divergent plate boundary?

Back

A divergent plate boundary is where two tectonic plates move away from each other, leading to the formation of new crust, such as at mid-ocean ridges.

Front

What is subduction?

Back

Subduction is the process by which one tectonic plate moves under another plate and sinks into the mantle, often creating trenches and volcanic arcs.

Front

What is the difference between oceanic and continental crust?

Back

Oceanic crust is denser and thinner than continental crust, which is thicker and less dense.

Front

What is a volcanic eruption?

Back

A volcanic eruption is the release of magma, gas, and ash from a volcano, often occurring at convergent or divergent plate boundaries.