Earth's Lithosphere

The inner core is solid due to _.  

• the rapidly flowing outer core 
• the fact it is composed of iron and nickel
•  the great pressure from the rest of Earth above it 
• the fact it is spinning so rapidly

What is the process that is thought to move the tectonic plates?

• Earth's rotation
• tidal forces from the Sun and Moon
• convection currents
• magnetic anomalies

This process occurs when a denser oceanic plate sinks beneath a less dense plate.

• rifting or seafloor spreading
• subduction
• shearing
• uplift

In what layer are the convection currents, shown in the diagram, occurring?

• oceanic crust
• Moho discontinuity
• asthenosphere
• outer core

What is likely happening at point B?

• plates are diverging and volcanic activity is forming new ocean crust
• plates are moving past each other at a transform boundary
• plates are converging and subduction is destroying old ocean crust
• plates are not moving at point B

Most earthquakes and volcanoes occur _.

• at plate boundaries
• randomly over Earth's surface
• in the middle of tectonic plates
• along transform boundaries

The spinning of the inner core and the flowing of the outer core cause _.

• Earth's rotation
• Earth's magnetic field
• the ocean tides
• the seasons

Boundaries like the San Andreas Fault where plates slide past each other are _.  

• subduction zones
• divergent boundaries
• convergent boundaries
• transform boundaries

Which type of boundary has plate moving apart? 

• Divergent
• Convergent
• Transform

Which type of boundary has plate moving together? 

• Divergent
• Convergent
• Transform