Theories
The name of the ancient super continent...
Pangea
About how many 8.0 or stronger quakes happen per year?
1
3
Place where the crust of the Earth is cracked where rock can or has moved.
fault
The point in the Earth's crust that an earthquake originates.
focus
Similar fossils on multiple continents and the shapes of the continents fitting together was evidence for what theory?
Continental Drift
This level on the Richter scale is where most people start feeling quakes.
4.0-4.9
What are the fastest waves called?
primary
Mid ocean ridges create what kind of plate boundary?
Divergent
Is it better for an entire building to move during an earthquake, or just part of it move?
Entire, because if some move and other parts don't it creates stress points that can lead to damage.
This technology was used to map the ocean floor...
Sonar
Most accurate earthquake scale because it measures multiple waves, the amount of rock movement, and the area it occured.
Moment Magnitude Scale
The most damaging waves are called...
surface waves
Mountains are most commonly formed at this type of plate boundary...
Convergent
Earthquakes under the ocean floor can create...
tsunamis
Older rock is found closer to or further from mid ocean ridges?
further
This scale solely depends on the amount of damage that occurs rather than the actual strength of a quake.
Mercalli Scale
up and down
A continent that is splitting apart is a result of what type of plate boundary?
divergent
In what decade was the theory of Continental drift proposed?
1910s
This theory describes the Earth's crust as being cracked like an egg shell.
Plate Tectonics
This scale is the most widely used by most people when measuring quakes.
Richter scale
These waves travel in a straight line like a coiled spring.
Primary
Use your hands to show the movement of a subduction boundary.
one hand on top of the other going in opposite directions.
Leading cause of death from earthquakes...
poorly constructed buildings