Earth Layers

Earth Layers

The DEEPER you go inside the earth, the GREATER the TEMPERATURE becomes

• Crust

• Mantle

• Outer Core

• Inner Core​

Earth Layers

Composition of the Earth

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The Crust

• It is the Earth's outer, most coolest, and LEAST DENSE layer.

• There is two types of crust: Continental and Oceanic Crust

• ​Oceanic Crust: Lies beneath the ocean, and is 5 to 10 Kilometers ( 3 to 6 miles) thick

• Continental Crust: Contains mostly land, and is 15 to 70 Kilometers ( 9 to 45 miles) thick, the thickest being under the mountain.

• There are areas known as the mid-ocean ridges where oceanic crust is constantly being created.​

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• The mantle is the layer directly below the crust.

• The mantle is the LARGEST layer of the Earth, and makes up most of the mass of our Earth.

• The mantle is divided into two regions: Upper and Lower sections​

The Mantle

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Lithosphere and Asthenosphere

Lithosphere: Rigid surface shell that includes upper mantle and crust ( here is where "Plate tectonics" work), cool layer

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Asthenosphere​: Layer below the Lithosphere, part of the mantle, weak and deformable (Can be reshaped). This layer deforms as plates move, partially melting of the material happens here. (Deeper so this layer is getting hotter).

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Multiple Choice

What is the largest layer of the Earth?

• Crust

• Mantle

• Asthenosphere

• Lithosphere

Multiple Choice

What layer is where "Plate tectonics work"?

• Asthenosphere

• Lithosphere

• Crust

• Mantle

Outer Core

• The outer core is the only liquid layer of the earth; a sea of mostly iron and nickel. It is roughly 1800-3200 Miles below the surface.

• The outer core is about 1400 miles thick

• Composition: Iron and Nickel​

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Inner Core

• The fourth layer is the Inner Core

• This layer stretches from 5150 km to 6370 km and is nearly 1200 km thick.

• The inner core is mostly made of SOLID IRON and has little amounts of nickel

• The inner core is believed to to have the EXTREME temperature and pressure conditions ​

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Categorize

Options (11)

Semi-Solid

Makes up most of the mass of Earth

Solid (Iron, Nickel, and Cobalt)

ONLY liquid layer

Solid

Asthenosphere makes up the uppermost portion of this layer

Densest Layer

Hottest Layer

Molten Liquid Iron, Nickel, and Cobalt

Lithosphere

Tectonic Plates

Organize these options into the right categories

Mantle

Inner Core

Outer Core

Crust

Multiple Choice

A crack in the Earth between two tectonic plates is called a

• Earthquake

• fault

• lithosphere

• asthenosphere

Multiple Choice

The lithosphere is made of the

• crust and inner core

• upper (outer) mantle and crust

• inner core and the outer core

• outer core and mantle

Multiple Choice

The mantle is denser than the _____________ because it has more iron and magnesium.

• Inner Core

• Outer Core

• Crust

• Entire Earth

Open Ended

As you go deeper into the Earth what two things occur?

Multiple Choice

This layer is made of hot liquid iron and nickel.

• Outer Core

• Inner Core

• Crust

• Mantle

Open Ended

The asthenosphere makes up what layer?