Earthquakes and Volcanoes

Front

What is the focus of an earthquake?

Back

The focus of an earthquake is the point below ground where the earthquake originates.

Front

What is magma when it reaches the surface of the Earth?

Back

When magma reaches the surface of the Earth, it is called lava.

Front

How do volcanoes form at plate boundaries?

Back

Volcanoes form at plate boundaries when tectonic plates collide, causing magma to rise and push up rocks.

Front

What are the second waves to arrive during an earthquake?

Back

The second waves to arrive during an earthquake are called S waves.

Front

What is the epicenter of an earthquake?

Back

The epicenter is the point on the Earth's surface directly above the focus of the earthquake.

Front

What are P waves?

Back

P waves, or primary waves, are the first waves to arrive during an earthquake and can travel through solids and liquids.

Front

What are surface waves?

Back

Surface waves are seismic waves that travel along the Earth's surface and usually cause the most damage during an earthquake.

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 the difference between mafic and felsic magma?

Back

Mafic magma is rich in magnesium and iron and is typically darker, while felsic magma is rich in silica and lighter in color.

Front

What is a tectonic plate?

Back

A tectonic plate is a large slab of the Earth's lithosphere that moves and interacts with other plates.