Layers of Earth and Plate Tectonics

This layer of Earth is solid Iron and Nickel

• Outer Core
• Mantle
• Inner Core
• Crust

Which layer of Earth is LIQUID iron and nickel?

• upper mantle
• lower mantle
• outer core
• inner core

What is the thickest layer of the Earth?

• the crust
• the mantle
• the outer core
• the inner core

This layer contains the upper mantle and the crust.

• Mesosphere
• Asthenosphere
• Lithosphere
• Core

Which layer(s) of the Earth make up the asthenosphere?

• Part of the upper mantle
• Crust, mantle, Core
• Crust and upper mantle
• Only the crust

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

• Continental crust
• oceanic crust
• Asthenosphere
• Lithosphere

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.

What does the theory of continental drift state?

• The continents were once joined in a super-continent and have moved over time
• Continents are stationary and do not move
• The Earth is broken into lithospheric plates that move due to convection currents
• none of the above

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