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34 Cards in this Set

  • Front
  • Back
what is the actual thickness of the lithosphere?
40 kilometers
what is the actual thickness of the Asthenosphere?
700 kilometers
what is the actual thickness of the Mantle?
2200 kilometers
what is the actual thickness of the outer core
2250 kilometers
what is the actual thickness of the innercore
1250 kilometers
what layer is the thickest?
outer core
what layer is the thinnest?
on average, the plates are moving about ___ inches per year.
The north American and pacific plates meet at the _____ fault
San Andreas
a beam of light that is reflected off a mirror to detect changes in distance
uses the speed of seismic waves to view the interior of the earth
seismic tomography
sedimentary layers deposited over faults shift as earth's crust moves
an instrument buried underground to detect motion
underground sensor
a wire is pulled as the crust moves
creep metter
______ occurs when water rises to the surface during an earthquake

most deaths in an earthquake are caused by ____
large buildings that collapse
list three things that make buildings more earthquake resistant
1. rubber shocks
2. wood buildings
3. shorter buildings
earthquakes may be a warning sign for a ____
coming volcano erruption
what is an earthquake?
movement of the earths crust that occur when the plates shift and release stored or potential energy
what are seismic waves?
shock waves from an earthquake.
name the three types of seismic waves?
Primary,secondary, and surface wave
the outermost layer which is made up of the silicates rich in aluminum, iron, and magnesium, is the ____
the innermost layer which is made up primarily of iron and nickel is called the ___
the layer between the outermost and innermost layer is called the ___
the outer layer is cool rigid and solid
beneath the outer layer is the hot, semi-liquid layer, called the ____
where the temperature differences cause matter to flow in a circular pattern known as
a shock wave caused by an earthquake is called a(n) ____
when a seismic wave reaches the _____, a thin boundary between the crust and mantle, its velocity suddenly increases.
this area is called the _____ and is thought to occur because the earths core stops S waves and bends P waves, causing their direction to change
shadow zone
What kind of fault is the Himalaya mountains?
reverse fault
What kind of fault is the mid- Atlantic ridge?
normal fault
What kind of fault is the San Andreas fault?
Lateral fault
Name the five most volcanically active regions in the U.S
Alaska, Hawaii, California,Oregon, and Washington (state)