Earthquakes and Seismic Waves

Front

What is the point at which the first movement occurs during an earthquake?

Back

Focus

Front

What is the shaking of the Earth’s crust caused by a sudden release of energy?

Back

Earthquake

Front

Tectonic plate movement occurs because of ___________________ currents in the ___________________.

Back

convection, mantle

Front

What is an instrument that detects and records waves produced by earthquakes?

Back

Seismograph

Front

The Richter scale measures...

Back

the strength or magnitude of an earthquake.

Front

What is the location on the Earth's surface directly above the focus of an earthquake?

Back

Epicenter

Front

What is a fracture in the Earth's crust where blocks of land have moved past each other?

Back

Fault

Front

What type of seismic wave travels the fastest and is the first to be detected?

Back

Primary wave (P-wave)

Front

What type of seismic wave causes the ground to shake up and down or side to side?

Back

Secondary wave (S-wave)

Front

What is the term for the energy released during an earthquake?

Back

Seismic energy