Let's Get Wavy
This is the FASTEST seismic wave.
P(primary) Wave
Name the 3 types of rock stress.
Tension, Compression, Shearing
What's a fault?
A fracture (crack) between two blocks of rock.
What's a boundary?
Where two plates meet.
The top layer of the Earth:
Crust
This wave travels through both solid and liquid layers.
P(primary) Wave
This type of stress occurs at convergent boundaries.
Compression
A footwall is the side of the rock that didn't move. A ______________ wall is the side that did move.
Hanging
Earthquakes are caused by a build up of _______________ at boundaries.
Pressure
The top layer is broken into pieces called:
Plates
This wave comes second, and is a bit slower.
S(secondary) Waves.
This stress occurs at transform boundaries.
Shearing
Which fault moves downwards?
Normal fault
This boundary has two plates moving towards each other.
Convergent
True/False: We can predict earthquakes.
False
This seismic wave is the slowest, and travels only through the crust.
Surface Wave
This stress occurs at divergent boundaries.
Tension
Which fault moves upwards?
Reverse Fault
This boundary has two plates moving apart.
Divergent
What is the name of the machine used to measure earthquakes?
Seismograph
This wave causes most of the damage during an earthquake.
Surface Wave
Rock stress builds up ______________ that causes an earthquake.
Pressure
Which fault moves horizontally?
Strike-slip Fault
This boundary has two plates sliding past each other.
Transform
What's the name of the scale used to measure the destruction from an earthquake?
Mercalli Scale