The Earth’s Interior Glencoe Ch. 12-3 Pages 370-372

A look inside the Earth

E a r t h’ s C r o s s - s e c t i o n

Layers of the Earth Crust –________________ and  2 types of crust

Layers of the Earth 1. Oceanic crust – under ______________, 4-7 km thick (high density) 2. _____________________ crust – under continents, ___-____ km (lighter in density)

E a r t h’ s C r o s s - s e c t i o n

Layers of the Earth - Mantle – _____________ km thick - rock - Upper mantle – ________________ rock (closer to surface) - ________________ mantle – plastic rock (___________ magma)

Layers of the Earth Lithosphere – _____ and solid upper mantle  solid and rocky Asthenosphere – soft and plastic __________mantle _______, _______, ________ rock and magma

Layers of the Earth

Layers of the Earth - _______________ – the innermost / center of the Earth - thought to be made of ___________ and ______________ 1. Outer core – _______________ metal 2. Inner core – _______________ metal

E a r t h’ s C r o s s - s e c t i o n

Layers 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 mantle 3. Heated solid and liquid metal in core heat is radiated outward toward the surface