Geologic Processes - Test Review

Front

What is a volcano?

Back

A volcano is an opening in the Earth's surface where molten rock, ash, and gases can escape from below the Earth's crust.

Front

How do volcanoes form at subduction zones?

Back

Volcanoes form at subduction zones when one tectonic plate is pushed under another, causing magma to rise to the surface.

Front

What is the Earth's crust?

Back

The Earth's crust is the outermost layer of the Earth, known for being the thinnest and having the lowest density.

Front

What happens at divergent plate boundaries?

Back

At divergent plate boundaries, tectonic plates pull apart, allowing magma to rise and cool, forming new oceanic crust.

Front

What is the outer core?

Back

The outer core is a layer of the Earth made of liquid metal that rotates and generates Earth's magnetic field.

Front

What is a tectonic plate?

Back

A tectonic plate is a large slab of solid rock that makes up the Earth's lithosphere and moves over the semi-fluid asthenosphere.

Front

What is a subduction zone?

Back

A subduction zone is an area where one tectonic plate is being forced under another, often leading to volcanic activity.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface that can erupt as lava during a volcanic eruption.

Front

What is the mantle?

Back

The mantle is the thick layer of the Earth located between the crust and the outer core, composed of solid rock that flows slowly.

Front

What is the difference between oceanic and continental crust?

Back

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