Lesson on Layers of Earth

Layers of the Earth

By Renee Dixon

The Earth has 3 main layers:

• Crust

• Mantle

• Core

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​Here's where I would put a Sherk onion joke

Think of the Earth like an onion

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Just like Sherk the Earth has 3 layers!

Fill in the Blank

The Earth has _____ layers

Layer 1: The Crust

Earth's Layers

Crust

• The surface of the Earth

• The thinnest layer of the Earth

• Made of soild rocks

Earth Layers

• The layer of Earth that we interact with

• "Litho" meaning stone in Greek

• Think "Lithosphere: It rocks to live here​"

​​Lithosphere

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• ​Forms the tectnoic plates that we live on

• Made mainly of granite​

​​Continental crust

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• Forms the ocean floor

• Made mainly of basalt

​​Oceanic crust

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Multiple Choice

I am a part of the crust, you would find me far below, farther than most human go. You would almost say that I'm under the sea,

it would be a long trip to come see me.

What am I?

• The Lithosphere

• The Continental Crust

• The Oceanic crust

Layer 2: The Mantle

Earth's Layers

Mantle

• Divided into two main layers: The Upper and The Lower Mantle

• Mostly solid rock but it does contain molten rock or magma

• Makes up 85% of the Earth's mass

Earth's Layers

Fill in the Blank

Name the two parts of the Mantle

• Contains the Lithosphere and the Asthenosphere

• ​The Lithosphere floats on top of the Asthenosphere

• ​Most made of solid rock with areas of molten or "plastic rock" (lava)

• "Asthens"​ means weak in Greek

• Think: Asthenosphere: Fear the molten rock here

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Earth's Layer

​Upper Mantle

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Multiple Choice

What should you fear in the Asthenosphere?

• Badger Moles

• Aliens

• Molten Rock

• Cowboys

Poll

What floats on top of the Asthenosphere?

• The Lithosphere

• The Continental Crust

• The Oceanic Crust

• People

• The Crust

• Made mainly of silicon and magensium

• ​Heat from the outer core causes movement in the lower mantle, that moves the lava in the upper mantle

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Earth's Layers

​Lower Mantle

Review:

On a piece of paper, write the answers

1. The earth's crust is made of what three parts?

2. What's the saying about the Lithosphere?

3. The​ Asthenosphere is made mostly of? With some areas of?

Some text here about the topic of discussion

Layer 3: The Core

Earth's Layers

Core

• Divided into two main layers: The Outer Core and the Inner Core

• Contains both a liquid and a solid layer

• Also referred to as the "NiFe" layer

Earth's Layers

• The only liquid layer

• Made mostly of liquid iron and nickel where it gets the name "NiFe" from

• ​This layer creates the Earth's magnetic field

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Earth's Layer

Outer Core

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• The center of the earth

• Made mostly of scorching hot iron and nickel.

• This layer remains in a soild state due to the intense pressure of the other layers​

• This layer is as hot as the sun​

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Earth's Layer

Inner Core

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