Term Time
the force on the rope in a tug of war between the 7th and 8th graders
tension
What scale measures earthquake magnitude?
Richter
The second wave to arrive
S wave
The angle of slope (downward from horizontal) of the face of a fault
Dip
Subduction would most likely be occurring at a ____________ boundary.
Convergent
oceanic crust slides down and under continental crust
subduction
The center of earthquake activity
focus
The fastest body wave
P Wave
What is the direction of motion in a dip-slip fault?
x2 points if you can name both types of this fault
up and down
Bonus: Normal Fault and Reverse Fault
Where do most earthquakes occur?
Tectonic Plate Boundaries
An instrument that simply measures earthquake waves is a _______________.
Seismometer
The amount of strain that can be absorbed by rock without breaking
(2 Answers, Double points if you answer with both)
elasticity or ductility
______ waves cannot pass through liquids.
Bonus: What part of the earth can these waves NOT pass through?
S
Bonus: The Core
What is the direction of motion in a strike-slip fault?
Horizontal
Used to potentially predict earthquakes, although not always reliable, a seismic _____ is an area along an active fault that has not had an earthquake recently
Gap
An instrument that both detects and records earthquake waves is a ______________.
Seismograph
Magnitude: The indicator of the _______ released by an earthquake
energy
Secondary, smaller earthquakes that result from a major earthquake are called ____________.
aftershocks
Most major faults in the United States are in _______
mountain ranges
The Modified Mercalli Intensity scale measures earthquake _________________.
Destructiveness/Damage
An ocean wave caused by an earthquake is called a(n) _______________.
tsunami
The point on Earth’s surface above the center of earthquake activity.
Epicenter
Rayleigh waves and Love waves are both examples of _____________.
Surface Waves
What type of energy is released as a result of a locked fault?
Elastic
One quake measures 6.0 on the Richter scale and another measures 7.0. How does the second quake’s energy compare with that of the first?
31.6 x