Q. Which type of plate boundary is Los Angeles on?
Pacific Plate
Q. At what type of boundary does compression occur?
convergent
Q. How is compression of rock stress related to convergent boundary?
Compression squeezes rocks together, causing rocks to fold or fracture (break) (figure 1). Compression is the most common stress at convergent plate boundaries. Rocks that are pulled apart are under tension. Rocks under tension lengthen or break apart.
Q. What does compressional stress create?
The stress that squeezes something. It is the stress component perpendicular to a given surface, such as a fault plane, that results from forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock.
Q. What type of stress is most often associated with a convergent plate boundary?
Since the rock cannot move, it cannot deform called confining stress. Compression squeezes rocks together, causing rocks to fold or fracture. Compression is the most common stress at convergent plate boundaries.
Q. What type of force causes convergent boundaries?
A convergent boundary is an active region of deformation where 2 or more tectonic plates meet. As a result of the pressure and friction between the plates, earthquakes and volcanoes are common in these areas.
Q. How does stress related to plate boundary?
Stress impacts the formation of small local faults, and broader tectonic plate boundaries. How the rock responds, depends on the type of stress and the conditions the rock is being subjected to when it encounters stress. It is this change in Earth’s crust that generates different types of faults and plate boundaries.
Q. Which stress occurs when rock is squeezed until it folds or breaks in a convergent boundary?
Compression
Q. What can form when compression squeezes rocks at a convergent plate boundary?
Compression squeezes rocks together, causing rocks to fold or fracture. Compression is the most common stress at convergent plate boundaries.
Q. What kind of stress stretches rock so that it becomes thinner in the middle?
Tension
Q. What is a stress force that squeezes rock?
Shearing – stress that pushes a mass of rock in two opposite directions. Tension – pulls on the crust, stretching rock so that it becomes thinner in the middle like warm bubble gum. Compression – squeezes rock until it folds or breaks like a giant trash compactor.
Q. What is the point beneath Earth’s surface where rock breaks?
*Inside Earth – Ch. 2 “Earthquakes” Games
| A | B |
|---|---|
| earthquake | The shaking that results from the movement of rock beneath Earth’s surface. |
| focus | The point beneath Earth’s surface where rock breaks under stress and causes an earthquake. |
| epicenter | The point on Earth’s surface directly above an earthquake’s focus. |
Q. When rock layers are stretched apart at divergent boundaries this is called?
Rock layers undergo stress when they are stretched apart at divergent boundaries. This stress is called: tightening. tension. compression.
Q. Do seismic waves travel from the epicenter?
The two types of seismic waves described in “Plate Tectonics,” P-waves and S-waves, are known as body waves because they move through the solid body of the Earth. S-waves only move through solids. Surface waves travel along the ground, outward from an earthquake’s epicenter.
Q. What causes a surface wave?
Wind-driven waves, or surface waves, are created by the friction between wind and surface water. As wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest.
