Composition (What it is made of):
Composition (What it is made of) Crust Mantle Core
The Crust:
The Crust Outer layer 5-100 km thick 2 types of crust Oceanic (very dense, made of basalt) Continental (less dense, made of granite)
Oceanic and Continental Crust:
Oceanic and Continental Crust
The Mantle:
The Mantle Middle layer Very thick layer
The Core:
The Core Made mostly of iron 1/3 of the earth’s mass Very hot
Earth’s Layers:
Earth’s Layers How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core
Physical Structure of the Earth (5 Layers):
Physical Structure of the Earth (5 Layers) Lithosphere - rigid outer layer (crust) Asthenosphere - solid rock that flows slowly (like hot asphalt) Mesosphere - middle layer Outer Core- liquid layer Inner Core- solid, very dense
Tectonic Plates:
Tectonic Plates Earth’s crust is broken into about 19 pieces These plates move on top of the asthenosphere