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

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

Which layer of Earth is the hottest?

• lithosphere
• asthenosphere
• outer core
• inner core

Compared to rock in Earth's crust, rocks in the mantle are more

• dense
• mineral-rich
• granular
• porous

If we compare the temperature and pressure of Earth's mantle to the core, what differences can we expect as we move downward into Earth?

• Both temperature and pressure increase.
• Both temperature and pressure decrease.
• Temperature decreases and pressure increases.
• Temperature increases and pressure decreases.

Which layer of Earth is LIQUID?

• upper mantle
• lower mantle
• outer core
• inner core