Tectonic Plates Summary

Which of the following best describes the location of the mantle?

• Above the crust

• Between the crust and the core

• Beneath the core

• Between the curst and the lithosphere

What is the underlying force that drives plate tectonics?

• Ocean Tides

• Earthquakes

• Rock Cycle

• Convection Currents

Convection currents are powered by

• Density

• Heat

• Pressure

• Water

Oceanic crust is ______ than continental crust.

• Less dense

• More dense

• Less hot

• More hot

When two plates differ in _____, subduction tends to occur. This forms oceanic trenches and volcanoes.

The process that continually adds new crust onto the ocean floor is:

• Earthquake

• Subduction

• Sea-Floor Spreading

• Convection Current

When plates slide past each other, such as the San Andreas Fault System, they are known as ____ boundary.

When two continental plates pull apart, a ____ is formed

• Subduction Zone

• Mountain Range

• Earthquake

• Rift Valley

What kind of features can subduction zones in the ocean create?

• Islands

• Volcanoes

• Earthquakes

• All of the Above

Where do mid-oceanic ridges form?

• On boundaries where one plate subducts beneath the other

• On boundaries where plates are spreading apart

• On boundaries where plates are sliding past each other

• On boundaries where plates are colliding