Plate Tectonics Vocab

Front

Soft mantle layer where lithosphere floats

Back

Asthenosphere

Front

Thin, solid outer layer of Earth above the mantle

Back

Crust

Front

Largest division of geologic time

Back

Eon

Tags

NGSS.MS-ESS1-4

Front

Epoch is the 4th largest division of geologic time

Back

Fourth

Front

Major geological time division, divided into 2+ periods.

Back

Era

Tags

NGSS.MS-ESS1-4

Front

Record of geologic events and life forms in Earth's history

Back

Geologic Time Scale

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Front

Dense sphere of solid iron and nickel at Earth's center

Back

inner core

Front

Rigid outer part of the earth, including crust and upper mantle

Back

lithosphere

Front

Layer of rock between earth's crust and core

Back

mantle

Front

Strong lower mantle between asthenosphere and outer core

Back

Mesosphere