Earth's Layers Mini Lesson

Earth's Layers

6.10.B model and describe the layers of Earth, including the inner core, outer core, mantle, and crust

1. What are the main

characteristics of the Earth’s
layers?

2. How can the Earth’s layers be

illustrated?

Essential Questions:

Earth's Layers

Crust
•The outer layer of the
earth

•5-50 km thick

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Earth's Layers

Lithosphere
•Solid outer section of
the Earth, which
includes the crust
(rocky layer)

•Is what makes up the plates

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Earth's Layers

Asthenosphere

-Weaker, less rigid (plasticity
like silly putty)

- Is what the plates float on

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Earth's Layers

Mantle
•Largest layer of the Earth

•Under the crust about 2,890km
•Composed of silicate rocks
rich in magnesium and iron

•Intense heat causes the rocks
to rise and then cool and sink.

•Convection is what causes the
crust to move.

•Average temperature 3000o

© KeslerScience.com

Earth's Layers

Outer Core

• Liquid layer (magma) 2,300 km

thick, second largest

• Composed of liquid iron and

nickel

• Lies between inner core and

mantle

• Because the magma moves

around the inner core, Earth’s
magnetic field is created.

• Average temperature 4000o -5000o

© KeslerScience.com

Earth's Layers

Inner Core
•A solid ball of metal

•1,250 km thick

•Made of solid nickel and iron

•So hot it melts everything in the
outer core

•Densest layer of the Earth
•Average temperature 5000o
-6000o

© KeslerScience.com

Multiple Choice

What is the correct order (starting from the surface) of Earth's layers?

• crust, mantle, inner core, outer core
• mantle, outer core, inner core, crust
• inner core, outer core, mantle, crust
• crust, mantle, outer core, inner core

Multiple Choice

Earth's inner core is

• a layer of hot rock
• a solid ball of iron and nickel
• a layer of liquid iron and nickel
• a layer of rock that forms Earth's outer skin
  

Multiple Choice

Which layer of the earth is a pure liquid?

• crust
• mantle
• outer core
• inner core

Multiple Choice

The soft layer of rock in the mantle that can act like a liquid and a solid is called the

• core
• asthenosphere
• lithosphere
• crust

Multiple Choice

The crust and the uppermost mantle make up the solid layer of hard rock called the

• inner core
• asthenosphere
• lithosphere
• outer core

Multiple Choice

How does temperature change as you move from the crust to the core?

• it gets cooler
• it gets hotter
• it stays the same
• the core is frozen

Multiple Choice

Earth has a magnetic field because of the liquid metal in the ____.

• Crust

• Mantle

• Outer Core

• Inner Core

Multiple Choice

The Inner Core is the same temperature as ___.

• Neptune

• The Crust

• The Sun

Reorder

Organize the Layers from the Surface to the Deepest.

• Crust

• Mantle

• Outer Core

• Inner Core

1

2

3

4

• 1
• 2
• 3
• 4

Match

Match the layer to its composition.

• Crust

• Mantle

• Outer Core

• Inner Core

Solid Rock

Liquid Rock

Liquid Metal

Solid Metal

• Solid Rock

• Liquid Rock

• Liquid Metal

• Solid Metal