Earth's Interior / Rocks

Which is thicker, the oceanic crust or the continental crust?

• oceanic crust
• continental crust

What is the correct order (starting from the surface) of Earth's layers?

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

Earth's inner core is...

• a dense ball of solid iron and nickel.
• a layer of molten iron and nickel.
• a layer of hot rock.
• a layer of rock that forms Earth's outer skin.

Which layer of Earth has the GREATEST density?

• crust
• mantle
• outer core
• inner core

Heat transfer within a fluid takes place by...

• convection currents
• radiation
• conduction
• density

Earth's magnetic field results from movements in the

• mantle
• outer core
• inner core
• crust

Scientists think that convection currents flow in Earth's

• continents
• mantle
• lithosphere
• inner core.

Which layer of Earth is the hottest?

• lithosphere
• asthenosphere
• outer core
• inner core

What are the two kinds of crust?

• lithospheric and asthenospheric
• silicon based and iron based
• continental and oceanic
• outer and inner

Which layer of Earth is the thinnest?

• crust
• mantle
• outer core
• inner core