Revision Grade 9

Which physical layer is the thinnest?

• crust
• mantle
• core

What are the two types of crust?

• top crust,bottom crust
• oceanic crust, continental crust
• water,land
• none of the above 

What is the correct layers of the earth starting with the surface?

• crust, outer core, inner core, mantle
• mantle, outer core, inner core ,crust
• crust, mantle, outer core, inner core
• outer core, inner core , crust, mantle

Which layer of Earth is liquid metal?

• Outer Core
• Mantle
• Inner Core
• Asthenosphere

In what layer does convection occur?

• Crust

• Mantle

• Inner core

• Shell

The _________ is broken up into pieces.

• crust

• mantle

• outer core

• inner core

The _________ is the thickest layer.

• crust

• mantle

• outer core

• inner core

The _________ is the thinnest layer.

• crust

• mantle

• outer core

• inner core

The ____________ is a solid metal ball.

• crust

• mantle

• outer core

• inner core

Which portion of the crust is thicker?

• Continental
• Oceanic