1	epicenter		_____	a substance that forms in nature, it is a solid, has a definite chemical makeup, and has a crystal structure
2	focus		_____	a layer of molten iron and nickel that surrounds the inner core of the Earth
3	seismic waves		_____	forces that cause rocks on either side of faults to push in opposite directions
4	seismograph		_____	the difference between changing levels of land
5	seismogram		_____	energy spreading out in all directions as vibrations
6	triangulation		_____	circular movement caused by the differences in temperatures
7	crust		_____	opening in the Earth's surface
8	lithosphere		_____	vibration record of seismic activity
9	basalt		_____	a dark, dense, igneous rock with a fine texture found in oceanic crust
10	granite		_____	forces that pull rocks apart
11	mantle		_____	mountain that forms around the vent from the cooled lava, ash, cinders, and rock
12	asthenosphere		_____	a long narrow raised land formation with sloping sides
13	outer core		_____	caused by compression forces
14	inner core		_____	rocks formed when liquid magma cools
15	aerial photography		_____	igneous rocks that form inside the Earth
16	satellite imagery		_____	rocks formed deep with the Earth when heat and pressure are applied to igneous or sedimentary rocks
17	topographic map		_____	a dense sphere of solid iron and nickel in the center of the Earth
18	elevation		_____	where two plates are moving apart
19	relief		_____	mountain formed when a normal fault uplifts a block of rock
20	slope		_____	the point in the crust, or mantle, where energy is released
21	contour lines		_____	where one plate slides under another less dense plate
22	contour intervals		_____	the layer of hot, solid material between Earth's crust and core
23	tension		_____	rock pieces, mineral grains, or shell fragments
24	compression		_____	method used to identify the epicenter of an earthquake
25	shearing		_____	rocks formed when sediments such as sand, silt and clay are under pressure from the layers above them
26	fault		_____	a usually light-colored rock that is found in continental crust
27	normal fault		_____	the difference in elevation represented by the space between adjacent contour lines
28	reverse fault		_____	a landscape, or surface, that is tilted or inclined
29	strike-slip fault		_____	caused by tension forces
30	folded mountain		_____	an area in the Pacific Ocean where volcanoes are common
31	fault-block mountain		_____	photographs taken from an elevated position
32	magma		_____	a rock that contains enough of a valuable mineral to be mined for a profit
33	vent		_____	fuels formed from the remains of prehistoric organisms that are burned for energy
34	lava		_____	places in Earth where forces or stresses cause rocks to break
35	volcano		_____	instrument used to measure seismic waves
36	Ring of Fire		_____	photographs of Earth made by satellites
37	lithospheric plates		_____	large sections of the Earth's crust that move
38	convection currents		_____	the layer of the earth that forms the Earth's outer surface
39	divergent boundary		_____	lines drawn on a map connecting points of equal elevation
40	convergent boundary		_____	the "supercontinent" from millions of years ago when all the large landmasses were joined together
41	transform boundary		_____	a deep, narrow depression on the Earth
42	subduction zone		_____	molten rock in the Earth's crust
43	plate tectonics		_____	forces that push or squeeze rocks together
44	Pangaea		_____	where two plates come together and collide
45	ridge		_____	the branch of geology that studies the folding and faulting of the Earth's crust
46	trench		_____	caused by shearing forces
47	rock		_____	the soft layer of the mantle on which the lithosphere floats
48	igneous		_____	a geographic location's height above sea level
49	intrusive		_____	a map that uses contour lines at different elevations to show valleys, hills and other topography of the area and the locations of roads, landmarks and other features
50	extrusive		_____	magma that reaches the Earth's surface
51	metamorphic		_____	point on Earth's surface directly above where the energy is released in an earthquake
52	sedimentary		_____	igneous rocks that form on the surface of the Earth
53	sediments		_____	rigid layer of Earth about 100 km thick made of the crust and a part of the upper mantel
54	rock cycle		_____	where two plates slide past each other
55	minerals		_____	solid inorganic material that is usually made of 2 or more minerals
56	ores		_____	mountain created from forces or stresses where the bending and stretching is applied slowly
57	fossils fuels		_____	the natural, repeating processes that change, break down, and re-form rocks