Earth's Layers Test Practice

Which of these correctly lists Earth’s layers in order from the center to the surface?

• inner core, asthenosphere, lithosphere, outer core

• inner core, outer core, asthenosphere, lithosphere

• asthenosphere, lithosphere, outer core, inner core

• outer core, inner core, asthenosphere, lithosphere

In the convection current of a pan of soup, the cooler, denser fluid

• stays on top

• stays where it is

• sinks to the bottom

• rises to the top

A difference between the oceanic crust and the continental crust is that the oceanic crust is

• continually being created.

• older than the continental crust.

• composed chiefly of sedimentary rocks.

• more dense than the continental crust.

Earth's lithosphere is broken into separate sections called

• plates

• faults

• trenches

• rifts

Subduction is

• the process that continually adds ocean floor.

• a device that bounces sound waves off underwater objects.

• the process by which oceanic crust sinks beneath trenches.

• the direct transfer of heat through solid materials.

What best describes the mantle of Earth?

• the smallest layer that is made up of molten rock

• the largest layer between the crust and outer core

• a solid layer made of iron and nickel

• a thin layer that is located on the surface

The inner core of Earth is solid because of the

• magnetic field.

• amount of pressure.

• extreme temperature.

• rate of rotation.

What causes the tectonic plates of Earth to continually move?

• rotation of the solid core

• convection currents in the mantle

• volcanic and seismic activity in the crust

• strong winds and storms

Earth's inner core is

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

How does temperature change as you move from the crust to the core?

• it gets cooler
• it gets hotter
• it stays the same
• the core is frozen