Layers of the Earth

What is the thinnest layer?

• Crust

• Mantle

• Outer Core

• Inner Core

What is the thickest layer?

• Crust

• Mantle

• Outer Core

• Inner Core

What is the coolest layer?

• Crust

• Mantle

• Outer Core

• Inner Core

The Lithosphere is made up of the ___________.

• Crust and Upper Mantle

• Inner and Outer Cores

• Outer Core and Lower Mantle

• Lower and Middle Mantle

What are convection currents?

• the cycle of heated rock or metal rising, and cooling rock or metal falling.

• the cycle of cooling rock or metal rising, and heated rock or metal falling.

• an electric current found in the mantle.

• and electric current found in the outer core.

What is the Asthenosphere?

• an elastic substance on which the tectonic plates float.

• the air that we breathe.

• another name for a globe.

• the hard inner core

What are the two types of crust

• continental and oceanic

• ocean and upper

• lower and upper

• pizza and subway

Which crust is thicker

• ocean

• continental

• asthenosphere

• pizza

What observation can we make about Earth’s lithosphere AND asthenosphere?

• The asthenosphere floats on top of the lithosphere.
• The crust and the core make up the lithosphere.
• The crust and mantle make up the asthenosphere. 
• The lithosphere floats on top of the asthenosphere

The asthenosphere is part of which layer?

• Inner core
• Outer Core
• Mantle
• Crust