Understanding Volcanoes and Earthquakes

Magma rises through weak spots in the Earth's crust, leading to ___ eruptions.

• shield

• tsunamis

• volcanic

• P-waves

The point inside the Earth where an earthquake originates is called the ___.

• shield

• focus

• tsunamis

• P-waves

Basaltic lava has low gas content and high fluidity, forming ___ volcanoes.

• shield

• tsunamis

• volcanic

• P-waves

___ waves are the fastest but least destructive seismic waves.

• shield

• tsunamis

• volcanic

• P-waves

A ___ is a massive sea wave caused by undersea earthquakes or volcanic eruptions.

• shield

• tsunamis

• volcanic

• P-waves

What is the difference between magma and lava?

• Magma is found on the Earth's surface, and lava is underground.

• Magma is underground, and lava is found on the Earth's surface.

• Magma is another name for lava.

Which type of plate boundary is associated with the San Andreas Fault?

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

Which of the following is NOT a type of volcanic material released during an eruption?

• Pyroclastic material

• Ash

• Water vapor

What is the primary cause of earthquakes?

• Tidal forces

• Movement of tectonic plates

• Atmospheric pressure changes

Which type of volcano is characterized by explosive eruptions and steep slopes?

• Shield volcano

• Composite volcano

• Cinder cone volcano