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Geology Quiz #3
The idea proposed by Alfred Wegener to explain the continental shapes and positions is know as ________
The work of geologists over the years had supported Wegner's contention that current continental masses were assembled into a super continent, which Wegner called ________
Which of the following lines of evidence supporting continental drift did Wegner not use when he first proposed his hypothesis?
The apparent polar wandering of the magnetic north pole
_______ is the process through which oceanic crust splits and moves apart along mid ocean ridge and new oceanic crust forms.
sea floor spreading
_______ technology has allowed scientists to measure movement of continental crust
global positioning system (gps)
At a _______, to lithospheric plates slide past one another horizontally
transform fault boundary
At a _______, oceanic crust is consumed back into the asthenophere
subduction zone boundary
At a _______, new oceanic crust forms along mid ocean ridges
A _______ is a convergent margin along which subduction is no longer active and high mountain ranges are formed
continental collision boundary
_______ is the horizontal movement and mutual interaction of large fragments of earths lithosphere
Largest record of earthquake have occurred at _______
subduction zone boundaries
What term best describes the driving source behind plate tectonics?
According to the elastic rebound model, earthquakes are caused by the _______
sudden release of elastic energy stored in rocks
_______ can provide a good idea of which regions are at risk for severe earthquakes
Which of the following are true of body waves?
they move through the earth interior
Which of the following is true of seismic waves reaching discontinuity inside the earths interior?
all of the above answers are correct
earths mantle is composed of _______, which surrounds a(n) _______ core
rock that contains iron- and magnesium -silicate minerals, molten iron-nickel
The asthenophere is a layer whose distinctiveness from the rest of the mantle is based on its _______