Earth's Layers
The earth is made up of the inner and outer core, the crust, and ________
Mantle
The idea that the earth's crust is made of moving plates.
Theory of Plate Tectonics.
Plate boundaries shifting suddenly releasing stored energy
Earthquake
Beginning point of an earthquake. Waves of energy are sent out from this point.
focus
Waves produced by P and S waves when they reach the surface of the earth
surface waves
The crust and upper area of the mantle is called ____
lithosphere
The places where plates meet.
plate boundaries
Breaks in the earth's surface along which rock can move.
Faults
The point on the surface of the earth directly above focus.
epicenter
Surface waves that move in a side-to-side zigzag pattern.
Love waves
Very thin layer of the earth
Crust.
Three ways that plates move against each other are collide, separate, and ______
slide
There are this many kinds of faults.
Three
Fastest moving body waves.
P wave
Surface waves that move in a rolling motion like ocean waves.
Rayleigh waves
Which is thicker, the crust under the continents or the crust under the ocean?
Crust under the continents.
A large landmass that some scientists think may have existed at one time.
Pangaea
This fault occurs where rocks push together until they force a section of rock upward.
thrust or revere fault
Body wave that moves in an up and down zig zag pattern
S Wave
A machine that scientists use to detect, time, and measure the movement of the earth
seismograph
Large pieces of the lithosphere are called _______
plates
Creationists think this caused great changes on Earth.
Noah's Flood
Rocks moving apart and a section of rock falling between the separating rocks.
Normal fault
A scientist who studies movements of the earth.
seismologists
A scale which depends on man's observations of an earthquake's destruction.
Mercalli scale