Front

Makeup of something

Back

composition

Front

Ball of hot, solid metals in Earth's center

Back

inner core

Front

Thin outer layer of rock

Back

crust

Front

Layer of liquid metals surrounding the inner core

Back

outer core

Front

Layer of the mantle where convection currents occur

Back

asthenosphere

Front

Earth's thickest layer

Back

mantel

Front

Top of the mantle and bottom of the crust, where tectonic plates are located

Back

lithosphere

Front

Part of the ear that converts vibrations to electrical signals

Back

cochlea

Front

Visible part of the ear

Back

pinna

Front

Carries hearing info from cochlea to brain

Back

auditory nerve