Earth's Interior!

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

When the heat source is removed from a fluid, convection currents in the fluid will

• speed up.
• change direction.
• eventually stop.
• continue at the same rate forever.

Using data from seismic waves, geologists have learned that Earth's interior is made up of several

• continents
• layers
• ridges
• trenches

Earth's mantle is

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

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