Intro

Intro

Objective 09/26/11Identify 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

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

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

Layers of the Earth Core Composition: Iron

Very dense Center of Earth

Layers of the Earth

Layers of the Earth Physical Layers Lithosphere

Asthenosphere Mesosphere Outer Core Inner Core

Layers of the Earth

LithosphereAsthenosphere

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 = 5,430°C (9,800°F).[

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 it’s split into five layers: lithosphere, asthenosphere, mesosphere, inner core and outer core.

Objective 09/26/11

Outro

Identify the layers of the Earth.

Write down:•3 things you learned today•2 reasons why it is important•1 question you still have