Vocab
define focus
beginning point of the earthquake
Name the layers of the earth.
crust, mantle, inner core, and outer core
What are the three types of faults?
strike slip, reverse, and normal
_________ are scientists that study the movement of the earth.
Seismologists
Seismologists use this machine to detect, time, and measure the movement of the earth.
A seismograph
Define lithosphere
the crust and the upper area of the mantle
the idea that the earth's crust is made of moving plates is called _________ _____________ ____ ____________ __________.
The theory of plate tectonics.
define faults
break's in the earth's surface.
These waves are seismic waves that occur below the earth's surface.
Body Waves
A large wave is called a ___________.
tsunami
beginning point of an earthquake.
focus
places where the plates meet are called _______ _____________.
plate boundaries
the point on the surface of the earth directly above the focus is called the _________________.
epicenter
________ waves are the fastest moving body wave. They travel in a straight path by a push and pull motion.
P wave (Primary)
What is the smallest size an earthquake can be on the Richter Scale?
2
places where the plates meet are called _______ _________________.
Plate boundaries
what is Pangea?
a single landmass that was once the earth.
Define strike-slip, normal, and reverse faults
define
_______ waves move more slowly and in an up and down pattern.
S wave (surface wave)
The ________ scale measures the magnitude of the seismic waves of an earthquake.
rocks along the plate boundaries shift suddenly and release their stored energy resulting in an _______________.
earthquake
What are large pieces of lithosphere called?
plates
What is the fault in California that many earthquakes occur on?
San Andreas Fault
__________ waves and __________ waves are two types of surface waves.
Love and Rayleigh
The _______ scale is based on the amount of destruction caused by earthquakes to manmade objects.
Mercalli