Ch.2 Flashcards
Stress-
A force that acts on rock to change it’s shape and volume.
Earthquake-
The shaking and trembling that results from the movement of rock beneath earths surface
Convergent boundary =
Stress force. Fault. Movement
Compression. Reverse. Hanging
Wall up
Divergent=
Stress force. Fault. Movement
Tension. Normal. Hanging wall⬇️
Transform=
Stress force. Fault. Movement
Shearing. Strike slip. No hanging wall
Deformation
Change in the volume or shape of earths crust
Focus
The point beneath the surface where the earthquake begins
Epicenter-
The point directly above the focus on the surface
Seismic waves-
The energy wave made by an earthquake through the crust
Primary waves-
Fastest compression waves
Secondary waves
Next wave you feel, side to side, longitude wave
Surface wave-
-slowest wave; the combination of P&S waves, most destructive
Shearing-
Stress that pushes a mass of rock on two opposite directions
Tension-
Pulls on the crust, stretching rock so it becomes thinner in the middle
Compression-
Squeezes rock until it folds or breaks