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plate theory
volcanoes
earthquakes
plate movements
misc.
100
is rock along the Mid-Atlantic Ridge younger or older than continental rock?
What is younger
100
the movement of magma towards or onto the earth's surface
What is volcanism
100
During the Alaskan earthquake of 1964, the majority of deaths were caused by this
What is a tsunami
100

The Mid-Atlantic Ridge is an example of what type of plate boundary

What is divergent

100
Thick, chunky lava that breaks into jagged chunks
What is aa
200
the two types of crust that make up the surface of the earth are
What is oceanic and continental
200
a major zone of active volcanoes partially encircles this ocean
What is Pacific
200
The epicenter of an earthquake that causes a tsunami occurs here
What is the ocean floor
200
The San Andreas Fault is an example of what type of plate boundary
What is transform
200
What happens when a plate with oceanic crust meets a plate with continental crust
What is the oceanic crust subducts under the continental crust
300
name something that provides us with a clue to earlier positions of lithospheric plates
What is fossil records, glacial scrapes, continental shapes, rock beds
300
this type of volcanic cone has a much gentler slope than the rest
What is shield
300
Seismographs are useful in predicting volcanic eruptions because they measure
What is earthquakes (shaking)
300
true or false: most buildings are constructed to withstand the swaying from earthquakes
What is true
300

What is formed when a magma chamber empties and collapses

What is a caldera

400
the magnetic orientation of rock is determined when?
What is when the rock solidifies
400
when solid rock in the earth's mantle melts, it forms a liquid rock called
What is magma
400
S waves can only travel through this type of material
What is solid
400
according to plate tectonics, the lithospheric plates 'float' on what layer
What is asthenosphere
400
the movement of lithspheric plates is caused by
What is convection currents with in the asthenosphere
500
the property of iron-bearing rocks provides evidence for what hypothesis of seafloor spreading?
What is paleomagnetism
500
volcanic rock particles small enough to be carried by wind
What is ash/dust
500
Which type of seismic wave causes rock particles to move at right angles to the direction in which the wave is traveling?
What is S waves
500
Convection currents originate in what layer
What is asthenosphere / mantle
500
geologists use the elastic rebound theory to explain
What is the cause of an earthquake