Unit 3 Plate Tectonics

This layer of Earth is the thickest part

• crust
• outer core
• mantle
• inner core

What was the name given to all the continents when they were joined as one super continent? 

• Supreme Continent
• Eurasia
• Plate tectonics
• Pangea

Which of the following occurs because of convection currents?

• Tectonic plates on the crust move.
• The mantle increases in size.
• Pressure in the crust increases.
• Pressure in the crust decreases.

Scientists think that convection currents that move the plates flow in Earth's

• Continental crust
• Oceanic crust
• Asthenosphere
• Lithosphere

The mantle of Earth is made partly of magma. When magma rises and sinks, this is called ______________. 

• a conduction current
• a hot spot
• a volcanic eruption
• a convection current

Which of the following did not support continental drift?

• magnetic striping on the ocean floor
• identical fossils on continents
• mountain ranges
• coastlines fit like a puzzle

Created by a divergent boundary.

• Rocky Mountains
• Mariana Trench
• Mid Atlantic ridge

Mountains form from ...

• plates sliding past one another
• collision of plates
• plates moving away from each other

During sea floor spreading, molten material rises up from the mantle...

• along the continents
• at the mid ocean ridges
• deep ocean trenches
• at north and south poles

Which of the following is where one plate slides under another plate?

• submarine zone
• divergence zone
• subduction zone
• lower zone