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S Chapter 5
Terms in this set (12)
The movement of Earth's plates creates great forces that squeeze or pull the rock in the crust as if it were a caramel candy bar. These forces are examples of ______, a force that acts on an area of rock to change its shape or volume
The type of stress called ________ pulls on the crust,
stretching rock so that it becomes thinner in the middle
A type of stress called ___________ squeezes rock until it folds or breaks
Stress that pushes a mass of rock in two opposite
directions is called ________
Tension in Earth's crust pulls rock apart,
causing _____ ______. In a normal fault, the fault is at an angle, so one block of rock lies above the other block of rock The block of rock that lies above is called the hanging wall.
The rock that lies below is called the footwall
In places where the rock of the crust is
pushed together, compression causes reverse faults to form. A _______ _____ has the same structure as a normal fault, but the blocks move in the opposite direction
In places where plates move past each
other, shearing creates strike-slip faults. In a strike-slip fault, the rocks on either side of the fault slip past each other sideways, with little up or down motion.
The _____ is the area beneath Earth's surface where rock that is under stress breaks, triggering an earthquake
The point on the surface directly above the focus is called the _______
The ________ _____ was developed to
rate earthquakes according to their intensity, or strength at a given place.
An earthquake's _________ is a number that geologists assign to an earthquake based on the earthquake's size.
The ______ _____ assigns a magnitude number to
an earthquake based on the size of seismic waves
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