A Level Tectonics Key Terms Part 1

Two plates pull apart, creating new land.

• Convergent Movement

• Divergent Movement

• Conservative Movement

• Seismic movement

Which is denser?

• Continental crust

• Oceanic crust

What can trigger a tsunami?

• Submarine earthquake

• Volcano

• Landslide

• Mantle Plume

• Conservative movement

Subduction is......

• the process by which oceanic plates split apart and new crust is formed from basaltic lava.

• Slope failure and the sudden downhill movement of soil and sediments, often caused by the ground shaking.

• The sudden rise and fall of the ocean floor, caused by an earthquake

• The process where the denser of two plates is forced downwards into the mantle upon meeting with the other plate.

A conservative plate margin is sometimes also referred to as a....

• Translate boundary

• Convergent boundary

• Transform boundary

• Benioff boundary

Which earthquake wave is this: fastest seismic wave, able to travel through liquids and solids, vibrating in the direction of wave motion.

• P Wave

• S Wave

• L Wave

Which earthquake wave is this: Slowest but most destructive wave type which travels close to the surface. Can create vertical or side to side shaking.

• S Wave

• P Wave

• L Wave

A lahar is.....

• Layer of volcanic material covering the land surface

• A mixture of volcanic rock, ash, and gases, heated up to 800 degree Celsius.

• Volcanic mudflow composed of pyroclastic and water that flows down a volcano and along a river channel

Saturated or partially saturated sediments lose mechanical strength during an earthquake. What is this?

• Crustal Fracturing

• Liquidation

• Pyroclasticism

• Liquefaction

A process by which dense and cold oceanic crust is pulled down under less-dense continental crust at a subduction zone is......

• Ridge Push

• Benioff Zone

• Slab Pull

• Hot spot sinking