BJU Science 6 Volcanos and earthquakes

Which of these is not a cause of earthquakes

• when molten rock moves under a volcano

• when large amounts of earth are removed or added

• after a tsunami erupts from pressure under the crust

• the buildup and release of energy when two surface plates move or shift against each other

Which is not a type of fault?

• forward

• strike-slip

• reverse

• normal

The idea that the earth's crust is made up of moving plates

• faults

• focus

• theory of plate tectonics

• seismic wave

What are breaks in the earth's surface along which rocks can move?

• faults

• focus

• theory of plate tectonics

• seismic wave

What is the beginning point of an earthquake called?

• fault

• focus

• theory of plate tectonics

• seismic waves

What are the vibrations of energy that flow out from the beginning point of an earthquake called?

• faults

• focus

• theory of plate tectonics

• seismic waves

What is the point on the surface of the earth directly above the focus called?

• epicenter

• magnitude

• Richter scale

• Seismograph

What is a machine that detects, times, and measures the movements of the earth called?

• epicenter

• magnitude

• Richter scale

• seismograph

What is the strength of the seismic waves of an earthquake called?

• epicenter

• magnitude

• Richter scale

• seismograph

What measures the magnitude of an earthquake's seismic waves and assigns it a number?

• epicenter

• magnitude

• Richter scale

• seismograph