DO NOW

Objective 09/28/12

Identify the layers of the Earth.

•Take out AGENDA & Weekly Worksheet• Week #5

•Color in foldable•Do you have your Raffle tickets?• Put your name on the back of them.

Intro

Objective 09/27/12

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?

Earth’s Systems

Atmosphere

Biosphere

Hydropshere

Geosphere

Earth’s gaseous layer of air above the surface

Earth’s life Plants Animals

Earth’s waters Oceans Rivers Lakes

Earth’s solid layers

LAYERS OF THE EARTH

Earth Inside and Out

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 Continental Crust

Less dense ~5-100km thick

Earth’s Crust

Continental Crust Less dense ~5-100km thick

Ocean Crust Very dense ~5-10km thick

Earth’s Crust

Continental land Continental shelf Slope Floor

Continental Crust Continental Crust Continental Crust Oceanic Crust

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

Earth’s Layers – Physical Properties

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 (3,833miles)

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 09/24/12

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