Chapter 21 Flashcards
1
Q
Block mountain
A
A mountain built by faulting
2
Q
Tremor
A
A mild earthquake
3
Q
Fault
A
A crack in a rock
4
Q
Faulting
A
The movement of a rock along a fault
5
Q
Earthquake
A
The shaking of the ground
6
Q
Seismograph
A
An instrument that measures the strength of earthquakes
7
Q
Vertical
A
Up and down direction
8
Q
Horizontal
A
Side to side direction
9
Q
What causes earthquakes
A
- Pressure in the earth splits rocks (called a “fault”)
- pressure builds on the rocks
- when the pressure is reduced, the blocks of rock move suddenly in opposite directions. This shakes the earth and it called an earthquake
10
Q
The movement of rocks along a fault is called _____
A
Faulting
11
Q
What are the two kinds of faulting
A
Side to side faulting
Up and down faulting
12
Q
What kind of mountains does faulting create
A
Block mountains
13
Q
What is a mild earthquake called
A
A tremor
14
Q
What is a seismograph
A
A decide that measure the strength of an earthquake
15
Q
What happens when an earthquake happens under the ocean
A
Causes tidal waves
