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Journey to the Center of Earth
Layers of the Earth
• Outer Crust• Inner Crust• Mantle• Outer Core• Inner Core
Crust
Inner Core750 mileradius
Outer Core1,430 miles
Mantle1,800 miles
Crust(10-25 miles)
Inside Our Earth
The inner core is made of solid nickel and iron.
The outer core ismade of hot liquid nickel and iron.
The crust is made of soil, water and rock.
The mantle is hot partmelted and part solidiron and magnesium.
Composition of the Earth’s Layers
Outer Crust
• This is the layer that we live on• The thickness ranges from five miles under the
oceans to 25 miles under the continents• Consists of cooled rock• It is the thinnest layer of the earth
The Mantle
• This layer is semi- liquid
• It consists of magnesium, iron, and silicon
• It is 3000 km wide• It is more solid closer
to the surface
The Outer Core
• This is consists of liquid due to the high temperatures
• It is 2100 km wide• This layer consists of nickel and iron
The Inner Core
• This layer is solid.• The reason it is solid is due to the high
pressure exerted on it from the outside layers.• It consists of the metals nickel and iron.• Its temperature is 6,000 degree Celsius.• Its width is 2,100 km.
Let’s Play
Rocks can move
Beneath the crust
Solid iron
Thinnest layer
Under the mantle
Plates ride on top
Melted iron
Center of Earth
Outermost layer
Solid rock
Earth’s ________ is divided into sections.
crust
How many sections is Earth’s crust divided into?
These sections are known as …
The place where plates meet is called a …
Most volcanoes and earthquakes are located at the …
Let’s Play
Mountains
Plates move apart
Volcanoes
Changes the shape of the ocean floor
Trenches
Plates collide
Two plates slide past one another
One plate slides under another
When two plates converge ________ may work its way through the crust.
magma
Magma may contain highly explosive ________.gases
A ____________ is formed when magma breaks through to the surface.
volcano
New _______ is formed when the lava cools and hardens.
land
An _______________ occurs when plates move and the crust slips or breaks.
earthquake
The gradual uplifting of the crust during an earthquake causes ____________ to form.mountains
THANK YOU!