Earth's Layers & Continental Drift

The thinnest layer of Earth is _______.

• crust

• mantle

• outer core

• inner core

The crust under continents is called _______.

• continental crust

• oceanic crust

• mantle crust

• core crust

Continental crust is mostly this: _______.

• granite

• basalt

• limestone

• sandstone

The crust under oceans is called _______.

• oceanic crust

• continental crust

• mantle

• core

Oceanic crust is mostly this: _______.

• basalt

• granite

• limestone

• sandstone

Which type of crust is thinner, denser, and contains more iron?

• continental

• oceanic

• lithosphere

• asthenosphere

The crust makes up what percent of the Earth's mass?

• less than 1 percent

• 5 percent

• 10 percent

• 20 percent

The thickest layer of Earth is _______.

• mantle

• crust

• core

• outer core

The layer that includes crust and upper layer of mantle is called _______.

• lithosphere

• asthenosphere

• mesosphere

• core

The part of mantle that moves because of convection currents is called _______.

• asthenosphere

• lithosphere

• mesosphere

• outer core