Earth Science Earth Quakes

Front

_____________ is a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.

Back

earthquake

Front

The point within the earth where rock is under stress is called _________________________.

Back

Focus

Front

__________________is the study of earthquakes and seismic waves that move through and around the earth.

Back

Seismology

Front

The point directly above the focus on the surface is called ___________________.

Back

Epicenter

Front

__________is a thin zone of crushed rock separating blocks of the earth's crust.

Back

Fault

Front

An instrument used to detect and record earthquakes is called _______________.

Back

Seismograph, Seismometer

Front

_______________ is a measure of the “size,” or amplitude, of the seismic waves generated by an earthquake source and recorded by seismographs.

Back

magnitude

Front

_________________ is a number (written as a Roman numeral) describing the severity of an earthquake in terms of its effects on the earth's surface and on humans and their structures.

Back

intensity

Front

Which of the following is NOT a cause of an earthquake? Collapse of Cavern, Eruption of Volcano, Lightning Strikes, Moving Tectonic Plates

Back

Lightning Strikes

Front

Which type of wave is the first to arrive after an earthquake occurs?

Back

P Wave