Plate Tectonics and Earthquakes

What is the crust that makes up the ocean floor called?

• oceanic crust
• crust
• continental crust

The movement of tectonics plates at a fault is a cause of what?

• convergent boundaries
• rift valleys
• Earthquakes

New seafloor is formed through the process of what?

• seafloor spreading
• continental drift
• divergent boundaries

What are underwater mountain ranges called?

• boundaries
• mid-ocean ridges
• rift valleys

Features formed at divergent boundaries are called?

• mountains
• earthquakes
• rift valleys

The place where old crust is pushed down into a trench is called what?

• subduction
• convection current
• deep-ocean trench

Two plates move toward each other at what?

• convergent boundary
• transform boundary
• divergent boundary

This famous fault in California has a lot of earthquakes!

• New Madrid

• Denali Fault

• Ramapo Seismic Zone

• San Andreas Fault

The movement of the tectonic plates is caused by

• the rotation of the Earth.

• convection currents in the Asthenosphere

• the gravity of the iron-nickel core.

• the Moho discontinuity.

In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?

• The strong ocean currents are undermining both areas causing earthquakes.

• Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.

• Both areas are subjected to strong ocean wind and waves that causes earthquakes.

• Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.