Earthquakes I
These are surfaces where rocks move when they break.
What are faults?
These are ocean waves caused by earthquakes.
What are tsunamis?
What type of stress twists rocks?
What is shearing?
What is the outer layer of Earth where earthquakes happen?
What is the Lithosphere?
What is a deep crack in Earth’s crust called?
What is a Fault line?
These are vibrations produced by the breaking of rock.
What are earthquakes?
This is the measure of the energy released during an earthquake made known by the height of the lines on the paper record of a seismograph.
What is magnitude?
This is a scientist that studies earthquakes and seismic waves.
What is a seismologist?
What scale measures intensity instead of magnitude?
What is the Mercalli scale?
What is the shaking of the ground called in an earthquake?
What is a tremor?
This is the point on Earth's surface directly above the earthquake focus.
What is the epicenter?
What layer of Earth do earthquakes mostly occur in?
What is the crust?
This scale describes how much energy is released by an earthquake.
What is the Richter scale?
What do we call smaller earthquakes after a big one?
What are Aftershocks?
What large plates move and cause earthquakes?
What are Tectonic plates?
This is an instrument that measures seismic waves from earthquakes.
What is a seismograph?
This is when wet soil acts more like a liquid due to the shaking from an earthquake.
What is liquefaction?
This kind of fault occurs when there is a break in rocks where rocks in either side of the fault move past each other (instead of above or below each other.
What is a Strike-Slip Fault?
This kind of fault occurs when there is a pull-apart (tension) fracture in rocks, where rocks that are above the fault surface drop downward in relation to rocks that are below the fault surface.
What is a normal fault?
What kind of boundary causes the strongest earthquakes?
What is a Convergent boundary?
This boundary layer lies between the Earth’s crust and mantle, marking where seismic waves suddenly speed up.
What is the Moho Discontinuity?
This is the area where seismic waves cannot reach because earth's liquid outer core bends primary waves and stop secondary waves.
What is the Shadow Zone?
These are waves of energy, released during an earthquake, that travel through earth by moving particles in rocks at right angles to the direction the wave is traveling.
What are secondary waves?
These are waves of energy, released during an earthquake, that travel through earth by compressing particles in rocks in the same direction the wave is traveling.
What are primary waves?
This kind of fault occurs when there is a compression fracture in rocks, where rocks tat are above the fault surface are forced up over rocks that are below the fault surface.
What is a reverse fault?