8th - chapter 8

Which of Earth’s layers is the thickest?

• the crust

• the mantle

• the outer core

• the inner core

Which part of Earth contains most of its mass?

• the biosphere

• the hydrosphere

• the atmosphere

• the geosphere

Which part of Earth contains plates?

• hydrosphere

• atmosphere

• core

• lithosphere

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

Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of

• seismic waves.

• rock samples.

• liquid iron.

• volcanic eruption.

Earth’s inner core is

• a dense ball of solid metal.

• a layer of molten metal.

• a layer of hot rock.

• a layer of rock that forms Earth’s outer skin.

Particles of hot soup rise slowly in a pot simmering on a stove. As the hot soup nears the surface, it begins to cool. The cooler soup sinks, forming a constant movement of soup that moves energy toward the surface of the pot. This constant movement of the soup in the pot is called a(n)

• magnetic field.

• energy system.

• convection current.

• conduction loop.

The transfer of energy through empty space is called

• conduction.

• convection.

• radiation.

• subduction.

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

• continents.

• layers.

• ridges.

• trenches.

Water vapor is water in the form of

• steam.

• crystals.

• a gas.

• droplets.