Earthquakes

Sheets of rock that make up the Earth's outer crust

• seismometer

• tectonic plates

• fault

• focus

A seismic wave that travels over the surface of the Earth

• surface wave

• fault

• seismologist

• epicenter

a large crack in the Earth's surface where earthquakes usually occur

• focus

• intensity

• Richter scale

• fault

a scientist who studies earthquakes

• epicenter

• Richter scale

• intensity

• seismologist

a device that measures the intensity of earthquakes

• seismometer

• epicenter

• intensity

• tectonic plates

measures the magnitude, or size, or an earthquake

• focus

• Richter scale

• tectonic plates

• fault

the point within the Earth where an earthquake rupture starts

• surface wave

• epicenter

• focus

• seismologist

the strength of the shaking motion of an earthquake

• epicenter

• intensity

• tectonic plates

• fault

the shaking movement that is sent out from an earthquake

• focus

• tectonic plates

• seismic waves

• seismometer

a sudden, violent shaking of the Earth, caused by shifting of the Earth's crust

• epicenter

• tectonic plate

• seismometer

• earthquake