IntroIntro Objective 09/26/11 Identify the layers of the Earth. If you tried to dig to the center of the earth, what do you think you would find? Would earth be solid or hollow? Would it be made of the same material throughout? Layers of the Earth Compositional property Physical property Materials and chemical compounds that make up a layer Solid, liquid, gas or combination Layers of the Earth Compositional Layers Crust Mantle Core Layers of the Earth Crust Composition: rock Thin, outermost layer Solid 2 Types of Crust Ocean Crust Very dense ~5-10km thick Continental Crust Less dense ~5-100km thick Layers of the Earth Mantle Composition: melted rock (magma) Contains metals such as aluminum and magnesium Denser than crust Solid and plastic-like Layers of the Earth Core Composition: Iron Very dense Center of Earth Layers of the Earth Physical Layers Lithosphere Asthenosphere Mesosphere Outer Core Inner Core Layers of the Earth Lithosphere Asthenosphere Mesosphere Outer Core Inner Core Layers of the Earth Lithosphere Physical property: solid, rigid Litho means rock Includes: Crust Upper part of mantle Broken into pieces called tectonic plates Layers of the Earth Asthenosphere Physical property: liquid & solid (like soft wax) Flows VERY slowly Includes: upper mantle Layers of the Earth Mesosphere Physical property: liquid & solid (like a very thick syrup) Includes: lower mantle Meso means middle Layers of the Earth Outer Core Physical Property: liquid Molten iron Layers of the Earth Inner Core Physical property: solid Iron From center of Earth to surface = 6,380km (10,633miles) Temperature = 5,430C (9,800F). [ [ The Layers of the Earth Summary: The inside of the earth is divided into three layers based on their composition: the crust, the mantle, and the core. Based on physical properties its split into five layers: lithosphere, asthenosphere, mesosphere, inner core and outer core. Objective 09/26/11 OutroOutro Identify the layers of the Earth. Write down: 3 things you learned today 2 reasons why it is important 1 question you still have