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ch 9 vocab quiz

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1.
1 point
form where two plates move together
2.
1 point
a range of volcanic mountains produced in part by the subduction of oceanic lithosphere
3.
1 point
the name of the supercontinent is called what?
4.
1 point
as certain rocks form, they acquire the polarity that Earth's magentic field has at the time. This is called what?
5.
1 point
at this boundary plates grind past each other without destroying the lithosphere
6.
1 point
in this process new ocean floor forms along the earth's mid ocean ridges and slowly moves outward across ocean basins and finally sinks back into the mantle
7.
1 point
this is a rising column of hot solid mantle rock
8.
1 point
a long chain of mountains in the center of the Atlantic Ocean that extend the length of the ocean
9.
1 point
to accomodate newly created lithosphere, older portions of the ocean floor return to the mantle. What is this process?
10.
1 point
a deep central valley that runs down the center of a ridge
11.
1 point
the lithosphere is broken into several huge pieces called what?
12.
1 point
long curved valleys along the edges of some ocean basins are called
13.
1 point
this is also called sound navigation and ranging its a sytem used to calculate the distance to an object
14.
1 point
the are found where two of earth's plates move apart
15.
1 point
in this plate motion mechanism, the force of gravity pulls old ocean lithosphere, which is relatively cold and dense deep into the mantle
16.
1 point
according to Wegener's hypothesis of________________the continents had been once joined to form a single supercontinent
17.
1 point
newly formed land consisting of an arc shaped chain of small volcanic islands
18.
1 point
A_________is a continuous flow that occurs in a fluid because of differences in density
19.
1 point
in this plate motion mechanism, the stiff ocean lithosphere slides down the asthenosphere that is elevated near mid ocean ridges
20.
1 point
this theory states that the Earth's lithospheric plates move slowly relative to each other driven by convection currents in the mantle
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