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Vocabulary from Module 6 of Apologia Educational Ministries' Exploring Creation with Physical Science (2nd Edition) by Dr. Jay Wile

Earth's crust

Earth's outermost layer of rock


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 rock

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 liquid and a solid


Vibration of the earth that results either from volcanic activity or rock masses suddenly moving along a fault


The boundary between two sections of rock that can move relative to one another


The point where an earthquake begins


The point on the surface of the earth directly above an earthquake's focus

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