Earthquakes!

What is a fault?

• A crack in a plate.
• Where two plates move toward each other.

An instrument that detects and measures earthquakes is a 

• seismogram
• focus seismic map
• focus
• seismograph 

Most earthquakes happen along the _________________. 

• coast
• faults
• desert
• directions

P-wave 

• The center of a earthquake. 
• Also know as shear or secondary wave. 
• Always the first to arrive;  seismic wave that causes particles of rock to move in back-and-forth direction
• Hilbert

Many earthquakes happen along the borders of...

• Countries
• Tetonic Plates
• Climate Zones
• None of the above.

What is an earthquake?

• When the earth causes an upward thrust in the epicenter.
• When the earth moves up and down along the ocean floor.
• When tectonic plates move against each other causing the earth to move. 
• None of the above

Which seismic wave does a seismograph detect first?  

• P Wave
• S Wave
• Surface Wave

The place on the Earth's surface, above the origin of the earthquake.

• Epicenter

• Focus

• Surface

• Crust

The place where an earthquake originates inside the Earth's surface is called...

• Epicenter

• Focus

• Underground

• Crust

This is created by earthquakes that occur on the ocean floor.

• longshore current

• gulf stream

• tsunamis

• high tide