LAYERS OF THE EARTH

BELLRINGER

List all four layers of the Earth.

Which layer of the Earth do we live on?

HOW MANY LAYERS ARE THERE?

There are four layers of the Earth

These four layers are:- the crust- the mantle- the outer core- the inner core

INTRODUCTION TO THE EARTH

http://animoto.com/play/IBukaX921hRDqMfxeR2VXA

VOCABULARY FLIP CHART – RIGHT SIDE!

Crust- the thin outermost layer of the Earth that we live on top of.

Mantle- the largest layer of the Earth that is made up of rock and magma. The mantle is constantly circulating.

Outer Core- Made up of liquid Iron, and very dense. Inner Core- Solid Iron, the densest part of the

Earth. 1,000 hotter than the sun. Lithosphere- includes the Earth’s crust and the top

of the mantle, made up of solid rock. Includes the Earth’s plates.

Asthenosphere- includes the rest of the Mantle that is made up of magma which is solid and liquid rock. Where the mantle’s circulation takes place.

CRUST The crust is the

thin, outermost layer of the Earth

It is similar to the peel of an apple in the sense that it is thin and covers the outside of the Earth

MANTLE-Hard, solid rock and liquid magma circulate around in the mantle.-This circulation moves tectonic plates and triggers Earthquakes and Volcanoes!-The mantle is the largest layer of the Earth

OUTER CORE

-Made up of liquid metal and liquid Iron-Extremely hot but not as hot as the inner core.

INNER CORE-1,000 times hotter than the sun.--Extremely dense and solid.--You have now made it to the center of the Earth!

LITHOSPHERE

The cold, rigid, brittle lithosphere is made of crust and the uppermost part of the mantle. Plates are made of lithosphere.

The warm, plastic asthenosphere underlies the lithosphere.

ASTHENOSPHERE

LITHOSPHERE / ASTHENOSPHERE

DEPTH OF THE LAYERS – LEFT SIDE ! !

Depth Layer Sphere Composition

0-30 km Crust Lithosphere Solid Rock

30-100 km

Mantle Lithosphere Solid Rock

100-250 km

Mantle Asthenosphere

Molten Rock

(Magma)250-2900

kmMantle Solid Rock

2900-5150 km

Outer Core

Molten (liquid)

Iron/Metal5150-6371

kmInner Core

Solid metal (Iron)

CANDY BAR EARTH

1. Unwrap the cold taffy and try to bend it. What happens?

2. Unwrap the warm taffy and try to bend it. What happens?

3. Look at the picture of Earth's layers on p. 2.

4. Which better represents Earth's lithosphere, the cold or the warm taffy? _____________

 Explain.   5. Which better represents the

asthenosphere? ____________   Explain.

HIGHER-ORDER QUESTIONS – PENCIL TALK

Q: What is the difference between Earth’s outer and inner cores?

Q: Where have you seen evidence of the movement of Earth’s plates?

UNIT PROJECT – DUE NEXT MONDAY

Earth’s Changing Surface:

Unit Project Assignment

WHAT DOES CRUST LOOK LIKE?

A lot of the crust is hard to see because it is covered by soil, rock and water

ROCKS Anywhere you can

see rock, you are seeing the crust of the Earth!!!

There are three types of rocks you need to know:- igneous rock- sedimentary rock- metamorphic rock

CRUST!!!!

WHAT IS IGNEOUS ROCK?

“Igneous” means “born of fire”

Igneous rocks form when magma (lava) from volcanoes cools down

Granite is a type of igneous rock

WHAT IS SEDIMENTARY ROCK?

Sedimentary rock forms when sediment (basically, bits of different elements) is compacted into rock

Chalk and limestone are types of sedimentary rocks

WHAT IS METAMORPHIC ROCK?

Metamorphic rocks form when other types of rock are squeezed together so much by the pressure within the Earth that they become new rocks

Marble is a type of metamorphic rock

IS THE CRUST DIFFERENT IN DIFFERENT PLACES?

Crust can be different depending on where you are.

For example, crust is thicker beneath continents than it is beneath oceans or rivers

Mountains are parts of the crust that stick out (made of rock), and beneath and near mountains, the crust is thickest