Physical Science - Module 6
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10 Terms
Earth’s crust
Earth’s outermost layer of rock.
Sediment
Small, solid fragments of rock and other materials that are carried and deposited by wind, water, or ice. Examples would be sand, mud or gravel.
Sedimentary Rock
Rock formed when chemical reactions cement sediments together, hardening them.
Igneous Rock
Rock that forms from molten lava.
Metamorphic Rock
Igneous or sedimentary rock that has been changed into a new kind of rock as a result of great pressure and temperature.
Plastic Rock
Rock that behaves like something between a solid and a liquid.
Earthquake
Vibration of the earth that results either from volcanic activity or rock masses moving along a fault.
Fault
The boundary between two sections of rock that can move relative to one another.
Focus
The point where an earthquake begins.
Epicenter
The point on the surface of the earth directly above an earthquake’s focus.