The tectonic plates float on the 

• lithosphere
• lower mantle
• outer core
• asthenosphere

This layer is completely liquid

• crust
• inner core
• mantle
• outer core

The core is made-up of what two elements?

• iron and nickel
• iron and oxygen
• nickel and silicon
• oxygen and silicon

The strong lower part of the mantle is a physical layer called the

• lithosphere
• mesosphere
• athenosphere
• outer core

This layer is solid & rigid

• Lithosphere
• asthenosphere
• mantle
• outer core

Which layer is made of the crust and upper mantle?

• lithosphere
• asthenosphere
• mesosphere
• outer core

The layer that the tectonic plates float on.

• lithosphere
• asthenosphere
• mesosphere
• crust

Made mostly of silicon, oxygen and aluminum.

• inner core
• outer core
• crust
• mantle

Which layer is made of liquid metal (Fe and Ni)?

• crust

• mantle

• outer core

• inner core

Which layer is the thinnest?

• crust

• mantle

• outer core

• inner core