1 .		The general term that refers to the deformation of Earth's crust and results in the formation of structural features such as mountains is ____________.
2 .		Most of Earth's seismic activity, volcanism, and mountain building occur along ____________.
3 .		The apparent movement of Earth's magnetic poles over time is referred to as ____________.
4 .		Complex mountain systems such as the Alps, Appalachians, and Himalayas are the result of ____________.
5 .		The type of plate boundary where plates move together, causing one of the slabs of lithosphere to be consumed into the mantle as it descends beneath an overriding plate, is called a ____________ boundary.
6 .		Typical rates of seafloor spreading average around __________ centimeters per year.
7 .		The name given by Alfred Wegener to the supercontinent he believed existed prior to the current continents was ____________.
8 .		Beneath Earth's lithosphere, the hotter, weaker zone known as the ____________ allows for motion of Earth's rigid outer shell.
9 .		The Red Sea is believed to be the site of a recently formed ____________.
10 .		The type of plate boundary where plates move apart, resulting in upwelling of material from the mantle to create new sea floor is a ____________ boundary.
11 .		Earth's rigid outer shell is called the ____________.
12 .		The age of the deepest sediment in an ocean basin ____________ with increasing distance from the oceanic ridge.
13 .		During oceanic-continental convergence, as the oceanic plate slides beneath the overriding plate, a ____________ is often produced adjacent to the zone of subduction.
14 .		The chain of volcanic structures that extends from the Hawaiian Islands to Midway Island and then continuing northward toward the Aleutian trench have formed over a ____________ as the Pacific plate moved.
15 .		The Aleutian, Mariana, and Tonga Islands are examples of ____________.
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