2. Composition (What is it made of?) Divided into 3 layers: Crust Mantle Core

3. The Crust: Rigid Outer Layer CONTINENTAL Thick Less dense Made of granite OCEANIC Thin Very dense Made of basalt Continental CrustOceanic Crust Mantle

4. The Mantle Thickest layer Hot, slow-flowing solid rock Made of magnesium

5. The Core Center of the Earth Densest layer Made of mostly iron and nickel Divided into 2 parts

6. Physical Layers Divided into 5 layers based on: – Temperature – Density – Ability to flow (solid/liquid) Lithosphere Asthenosphere Mesosphere Outer Core Inner Core

7. Lithosphere Outermost, rigid layer (solid) Divided into tectonic plates Made of the crust and upper mantle Thinnest layer Lithosphere

8. Asthenosphere Soft solid Tectonic plates float on this layer Moves as fast as your fingernails grow Weak layer “Putty”-like layer Asthenosphere

9. Mesosphere Solid Strong Thickest layer Lower part of the Mantle Mesosphere

10. Outer Core Liquid- rock melts Surrounds the inner core Outer Core

11. Inner Core Solid- due to extreme pressure Dense center of the Earth Hottest layer Inner Core