point on earth's surface directly above an earthquake focus.

fracture that occurs when rocks break and that results in relative movements of opposing sides.

molten rock flowing onto earth's surface.

ridged layer of the earth about 100 km thick crust and part of the upper mantle.

a measure of energy released by an earthquake.

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earth science rocks

terms and definitions

Question	Answer
Epicenter	point on earth's surface directly above an earthquake focus.
Fault	fracture that occurs when rocks break and that results in relative movements of opposing sides.
Lava	molten rock flowing onto earth's surface.
Lithosphere	ridged layer of the earth about 100 km thick crust and part of the upper mantle.
Magnitude	a measure of energy released by an earthquake.
Rifts	long cracks, fissure