The Layers of the The Layers of the Earth!Earth!

Vocabulary wordsVocabulary words

• Earth

• Crust

• Mantle

• outer core

• inner core

• Lithosphere

• asthenosphere

Day 1Day 1

• B: Earth Layer’s pre-assessment

• D: Earth Layers notes

• A: Exit Slip

Earth LayersEarth Layers

• The Earth is divided into four main layers.

1.Inner Core2.Outer Core3.Mantle 4.Crust

The CrustThe Crust• The crust is the

outermost layer of the Earth.

• This crust is not a solid shell. It is broken up into huge, thick plates that drift on top of the soft, underlying mantle.

• It is made of oxygen, silicon, aluminum.

Two Types of CrustTwo Types of Crust

• Continental crust is the crust the makes up the continents. It is thicker and older than oceanic crust.

• Oceanic crust is the crust below the oceans. It is thinner and younger than the continental crust.

• Example:

The MantleThe Mantle• The mantle is the

layer of Earth between the crust and the core.

• ● It contains most of the Earth’s mass.

• ● It has more magnesium and less aluminum and silicon than the crust.

• ● The mantle is denser than the crust.

The mantle divided into 2 parts:The mantle divided into 2 parts:

• Upper mantleUpper mantle • Lower mantleLower mantle..

Sub Layers of the MantleSub Layers of the Mantle

1. LITHOSPHERE: This is the “crunchy” layer of the Earth. It includes the crust and the very uppermost part of

the upper Mantle.

2. ASTHENOSPHERE: Soft – can bend like plastic, layer in the upper

portion of the mantle. It is located right below the Lithosphere. Lithosphere floats on this layer (like jello)

Day 2Day 2

The coreThe core

• CORECORE: : (Egg Yolk)(Egg Yolk)• Located below the Mantle.Located below the Mantle.

• It is divided into 2 layersIt is divided into 2 layers• Outer Core Outer Core

• Inner CoreInner Core

Outer CoreOuter Core• Is liquid and is

made up of mostly iron (easily magnetized)

• The movement of materials in the liquid O.C. is inferred to be the cause of Earth’s magnetic field!

• The O.C. is about 2250 km thick.

Inner CoreInner Core• Is the center of the

Earth – 1200 km thick.

• It’s solid iron and nickel. Most dense layer (heaviest)

• The increased pressure causes the I.C. to be solid

Students: Draw this illustration.Students: Draw this illustration.

Exit Slip:Exit Slip:

1) What are the four layers of the Earth?

2) The Earth’s crust is very ______?

3) The mantle is the largest layer of the Earth? True or False

4) Is the Outer Core a liquid or a solid?

Answers!Answers!

1) Crust, Mantle, Outer Core, Inner Core

2) Thin3) True4) Liquid

Day 3Day 3

• B: EGG demonstration

• D: Play Bill Nye video with worksheet

• Link to video: https://www.youtube.com/watch?v=Av-tvSxnS_A

• A: Compare notes

After the video:After the video:

• After the video list 3 things you know now because of the video that you did not know before:

• 1.

• 2.

• 3.

Day 3 (optional)Day 3 (optional)

• The ppt may take 2 days so I left this as a “catch up”/optional day.

• Before: Read Magic school bus “Inside the Earth”

• During: Earth’s layers foldable

• After: Complete the foldable and keep as a study guide