Plate Tectonics

What was Alfred Wegener's theory about the continents?

• They were formed by volcanic eruptions.

• They were created by the movement of tectonic plates.

• They were once connected as a supercontinent called Pangea.

• They were always in their current positions.

What drives the movement of tectonic plates?

• The gravitational pull of the moon.

• The rotation of the Earth.

• Convection currents in the mantle.

• Wind currents on the Earth's surface.

Which type of boundary is most likely to cause earthquakes?

• All of the above.

• Divergent boundaries where plates pull apart.

• Transform boundaries where plates slide past each other.

• Convergent boundaries where plates collide.

What happens at subduction zones?

• A dense ocean plate sinks below a lighter continental plate.

• Plates slide past each other without causing any geological activity.

• New seafloor is created at the Mid-Atlantic Ridge.

• Two continental plates collide and form mountains.

How are mountain ranges formed by plate tectonics?

• By volcanic eruptions at divergent boundaries.

• By the expansion of the Earth's crust.

• By the sinking of ocean plates into the mantle.

• By the collision of two continental plates of similar density.