1
Two blocks of rock slide HORIZONTALLY past one another in OPPOSITE directions
2
Forces push two blocks of rock together with the block ABOVE the fault MOVING UP relative to the block above the fault.
3
Where magma collects in a pocket
4
Squeezes rock until it folds or breaks
5
Forces pull two blocks of rock apart. Block above the fault MOVES DOWN relative to block of rock above the fault
6
An instrument that detects, records, and measures the vibrations produced by an earthquake.
7
The record made by a seismograph; the paper on which earthquake waves are recorded
8
Type of boundary where continental plates COLLIDE with a continental or oceanic plate.
9
Vibrations in the earth caused by the sudden release of energy, usually as a result of the movement of rocks along a fault
10
The point on the surface of the earth directly above the focus of an earthquake.
11
Type of boundary where two plates slip past each other moving in OPPOSITE directions
12
Type of boundary where two plates move APART, or DIVERGE, usually occur at mid ocean ridges
13
Pushes a mass of rock in two OPPOSITE directions
14
Pulls on the crust, stretching rock so it becomes thinner in the middle
15
The time between the arrival of P-waves and S-waves at a location where an earthquake occurs
16
A bowl shaped area that may form at the top of a volcano around a central vent
17
A primary ( compressional) earthquake wave that travels through the body of the earth; so named because it is the first wave to reach a seismograph station during an earthquake.
18
Force that acts on a rock to change its shape and volume
19
A secondary earthquake wave; so named because it travels slower than a primary wave and is the second wave to reach the seismograph station after an earthquake. It travels through the body of the earth as a series of crests and troughs.
20
A fracture in bedrock, along which blocks of rock on opposite sides of the fracture move.
21
Molten rock and gas leave the volcano through this opening
22
The magma moves upward through this part of the volcano
