Vocabulary
What is a seismograph?
An instrument that records an earthquake's seismic waves.
What does the Modified Mercalli Scale measure?
The amount of shaking from an earthquake.
How do reverse faults form?
When rocks push against each other
Which wave comes after the P wave?
The S wave
Does the syncline bend upwards to form an arch or downwards to form a "V" shape?
Downwards to form a "V" shape
What is a plateau?
A large area of land above sea level.
Which scale measures the small seismic waves off of small earthquakes?
The Richter Scale
Which fault's blocks move in the opposite direction of a normal fault?
Reverse Fault
Which wave is the slowest?
Surface waves
How long does it take for pieces of crust to collide and form a mountain?
It takes millions of years
What is an epicenter?
The area directly above the focus.
What is the effect on measuring seismic waves the further away a seismograph is from an earthquake?
Moment Magnitude Scale
Which fault has little up or down motion and moves past each other?
Strike-Slip Fault
Which wave cannot travel through liquids?
S Waves
How do folds form?
Folds form when compression shortens and thickens Earth's crust
What is a focus?
The area under Earth's surface where rock begins to move.
Which scale measures the total energy off of an earthquake?
Moment Magnitude Scale
Which block of rock lies over a normal fault?
The hanging wall
Which wave expands and compresses the ground?
P waves
The forces of ____ _____ can cause flat plains to change into majorly different structures such as synclines, anticlines, fault-block mountains, folded mountains, and plateaus.
Plate Movement
What is a seismogram?
The record of an earthquake's seismic waves.
What does an earthquake's moment magnitude (not the scale) tell geologists?
What kind of boundary form a strike-slip fault?
A transform boundary
Which wave's particle motion that is perpendicular to the wave travel?
S waves
What is the estimated size range that a fold can be?
A few centimeters to hundreds of kilometers