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chapter 5 SECTION 1
SEC.1 Earth's Crust in Motion
17
Science
Not Applicable
10/02/2005

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Term
earthquake
Definition
The shaking that results from the movement of rock beneath Earth's surface.
Term
stress
Definition
A force that acts on rock to change its shap or volume.
Term
shearing
Definition
Stress that pushes a mass of rock in opposite direction.
Term
tension
Definition
Stress that streches rock so that it becomes thinner in the middle.
Term
compression
Definition
Stress that sqeezes rock until it folds or breaks.
Term
deformation
Definition
A change in the volume or shape of Earth's crust.
Term
fault
Definition
A break or crack in Earth's lithosphere along which the rocks move.
Term
strike-slip fault
Definition
A type of fault where rockson either side move past each other sideways with little up-or-down motion.
Term
normal fault
Definition
A type of fault where the hanging wall slides downward;caused by tension in the crust.
Term
hanging wall
Definition
The block of rock that forms the upper half of a falt.
Term
footwall
Definition
The block of rock that forms the lower half of a fault.
Term
reverse fault
Definition
A type of fault where the hanging wall slides upward; cased by compression in the crust.
Term
fault-block mountain
Definition
A mountain that forms where a normal fault uplifts a block of rock.
Term
folds
Definition
A bend in rock that forms where part of Earth's crust is compressed.
Term
anticline
Definition
An upward fold in rock formed by compression of Earth's crust.
Term
syncline
Definition
A downward fold in rock formed by compressionmin Earth's crust.
Term
plateau
Definition
A landform that has a more or less levelsurface and is elevated high above sea level.
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