Earthquake Quiz

The stress force that squeezes rock until it folds or breaks

The Richter Scale measures

This rates the amount of shaking from an earthquake

In a ____________, the rocks on either side of the fault slip past each other sideways with little up or down movement.

The area beneath Earth's surface where rock that was under stress begins to break or move

Stress that pushes a mass of rock in two opposite directions

_______________occurs when two plates pull apart.

_____________occurs where two plates pull apart.

This scale is used to rate the total energy an earthquake releases

An instrument that records and measures an earthquake's seismic waves

A ___________has the blocks move in the reverse direction of anormal fault.

The Moment Magnitude Scale

A single number that geologists assign to an earthquake based on the earthquake's size

Modified Mercalli Scale measures

Magnitude scales are based on the earliest magnitude scale called the____________

When plates push against each other, ________________ occurs. This happens where two plates come together.

The stress force that pulls on teh crust and thins rock in the middle

The point on the surface directly above the focus is called______________

The pattern of lines that is a record of an Earthquake's seismic waves

A large area of flat land elevated high above sea level

Move more slowly but can produce severe ground movements. They are like waves in water.

During ____________ rock can break or slip art or change its shape.

Waves can vibrate side to side or up and down; these are secondary waves

In a __________, the fault cuts through rock at an angle.

_______________occurs where two plates slip past each other.

The shaking and trembling that results from movement of rock beneath Earth's surface

______________can make rock act like a piece of warm bubble gum and the rock thins in the middle.

Seismic waves that compress and expand the ground like an accordian