Plate Tectonics

Alfred Wegener named his single supercontinent ____________, which means "all Earth" in ancient Greek.

• Pandora

• Gandowandaland

• Pangea

• Percia

What type of fossils were noticed by Wegener to be found on two different continents?

• Leaves and flowers
• Ice and mountains
• Plants and animals
• Dinosaurs and reptiles

Most geologists think that the movement of Earth's tectonic plates is caused by

• the rotation of the Earth.

• the Earth's magnetic field.

• subduction.

• convection currents.

When plates collide we get ________.

• crumbles

• volcanos

• trenches

• mountain ranges

Associated with transform boundaries.

• Volcanoes
• mountains
• trenches
• earthquakes

A location where two tectonic plates collide is known as a _________ boundary.

• Convergent
• Divergent
• Transform
• Spreading

Which layer of Earth flows slowly and causes the crust to move?

• Crust

• Mantle

• Inner Core

• Outer core

Subduction means.....

• one plate goes under another plate

• two plates slide past each other

• two plate collide and form folded mountains

Sea-floor spreading explains how.....

• new crust is created at a divergent boundary

• volcanoes are formed on continents

• deep sea trenches are formed

An opening on the Earth's crust through which hot molten rock flows out from deep inside the Earth.

• Volcano

• Fault line

• Fold

• Crater