Earthquakes..

At a __________ __________, two plates are colliding together and one is being forced upward in relation to the fault surface.

• fault

• reverse fault

The actual site in Earth's crust where the built-up pressure finally breaks free and causes an earthquake is called the ________.

• focus

• earthquake

A _________ is a massive wave caused by an earthquake.

• epicenter

• tsunami

The _______ magnitude of a quake tells the severity of the seismic waves.

• strike-slip fault

• magnitude

Earthquakes always occur at ________, or the surface where two plates meet.

• fault

• tsunami

An ___________ occurs when two plates become stuck during their movement, pressure builds, and is eventually released causing seismic waves of shaking in the surrounding area.

• normal fault

• earthquake

At a _________ __________, two plates are pulling away from each other and rock above the surface moves downward.

• normal fault

• epicenter

The point on Earth's surface directly above the focus of a quake is called the ________.

• epicenter

• magnitude

Scientists use _________ to measure the magnitude of a quake.

• tsunami

• seismograph