The Earth’s InteriorThe Earth’s Interior

Glencoe Ch. 12-3 Glencoe Ch. 12-3

Pages 370-372Pages 370-372

A look inside the EarthA look inside the Earth

EEaarrtth’h’ss CCrroossss--sseeccttiioonn

Layers of the EarthLayers of the Earth- Crust –________________ and

__________________ layer

2 types

of crust

Layers of the EarthLayers of the Earth

1. Oceanic crust – under ______________, 4-7 km thick (high density)

2. _____________________ crust – under

continents, ___-____ km (lighter in density)

EEaarrtth’h’ss CCrroossss--sseeccttiioonn

Layers of the EarthLayers of the Earth

- Mantle – _____________ km thick - rock

- Upper mantle – ________________ rock (closer to surface)

- ________________ mantle – plastic rock (___________ magma)

Layers of the EarthLayers of the Earth

Lithosphere – _____ and solid upper mantle

solid and rocky

• Asthenosphere – soft and plastic __________mantle

_______, _______, ________ rock and magma

Layers of the EarthLayers of the Earth

Layers of the EarthLayers of the Earth

- _______________ – the innermost / center of the Earth

- thought to be made of ___________ and ______________

1. Outer core – _______________ metal

2. Inner core – _______________ metal

EEaarrtth’h’ss CCrroossss--sseeccttiioonn

Layers of the EarthLayers of the Earth

- As you go toward the Earth’s core the temperature steadily ______________- Evidence –1. Radioactive decay of unstable _______2. Heated liquid rock in mantle3. Heated solid and liquid metal in core

heat is radiated outward toward the surface