The document describes the composition and structure of the Earth, which is made up of layers including a crust, mantle, and core. The crust is the outer layer and exists in oceanic and continental forms, while the mantle is the thick middle layer made mostly of silicate rock. At the center is the core, about 1/3 of the Earth's mass, with an outer liquid layer surrounding a solid inner core made of iron.

1. Inside the Earth

2. Composition (What it is made of) Crust Mantle Core

3. The Crust Outer layer 5-100 km thick 2 types of crust Oceanic (very dense, made of basalt) Continental (less dense, made of granite)

4. Oceanic and Continental Crust

5. The Mantle Middle layer Very thick layer

6. The Core Made mostly of iron 1/3 of the earth’s mass Very hot

7. Earth’s Layers How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core

8. 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

9. Tectonic Plates Earth’s crust is broken into about 19 pieces These plates move on top of the asthenosphere