Earth's layers

What is the outermost layer of the Earth?

• crust
• mantle
• outer core
• inner core

Which is thicker, continental or oceanic crust?

• continental
• oceanic

What layer of the mantle is flexible like plastic?

• lithosphere
• asthenosphere
• lower mantle

What layer of the mantle breaks into plates and is like the crust?

• lithosphere
• asthenosphere
• lower mantle

Which part of the core is liquid metal?

• outer core
• inner core

What two metals make up the core?

• aluminum and silver
• iron and nickel

What layer is the thickest?

• crust
• mantle
• inner core
• outer core

What is the order of Earth's layers from most dense to least dense?

• crust, mantle, outer core, inner core

• crust, outer core, mantle, inner core

• inner core, outer core, mantle, crust

• inner core, outer core, crust, mantle

Which layer is considered the tectonic plates of Earth?

• lithosphere

• asthenosphere

• mesosphere

Why is the inner core believed to be solid?

• because iron and nickel are always solid

• because nickel is not dense

• because it has immense pressure on it by all the layers above it and cannot expand or flow

• because it is mostly made of granite and basalt, two solid substances