Download - Let’s look at the Earth
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Let’s look at the Earth
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The Inside of the Earth is made of Several Layers
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The Inside of the Earth is made of Several Layers
The Crust:A Thin Rock Material
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The Inside of the Earth is made of Several Layers
The Mantle:A Dense and Mostly Solid Rock Material
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The Inside of the Earth is made of Several Layers
The Outer Core:Liquid Iron and Nickel
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The Inside of the Earth is made of Several Layers
The Inner Core:Solid Iron and Nickel
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How Do We Know This?
The Outer Core:Liquid Iron and Nickel
The Inner Core:Solid Iron and Nickel
The Mantle:A Dense and Mostly Solid Rock Material
The Crust:A Thin Rock Material
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Why do the layers of the earth float on one another?
DENSITY
!!!!!
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Density determines a layer’s location!
Why does any layer float?• It is less dense than the one
under it!
Why does any layer sink?• It is more dense than the one
above it!
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Density
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The Density of Earth is 5.53 gm/cm3
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The Density of Earth is 5.53 gm/cm3
We know the surface of the Earth is covered with Rocks
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The Density of Earth is 5.53 gm/cm3
The Land is covered mostly by a type of rock called
Granite
(density of Granite = 2.6 gm/cm3)
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The Density of Earth is 5.53 gm/cm3
The Ocean is mostly covered by a type of rock called Basalt
(density of Granite = 3.3 gm/cm3)
The Land is covered mostly by a type of rock called
Granite
(density of Granite = 2.6 gm/cm3)
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The Density of Earth is 5.53 gm/cm3
Granite = 2.7 gm/cm3
Basalt = 3.3 gm/cm3
Neither of these Rocks is dense enough to account for
the density of the Earth
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The Density of Earth is 5.53 gm/cm3
Granite = 2.7 gm/cm3
Basalt = 3.3 gm/cm3
Iron has a density of 7.9 gm/cm3
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The Density of Earth is 5.53 gm/cm3
Granite = 2.7 gm/cm3
Basalt = 3.3 gm/cm3
Iron has a density of 7.9 gm/cm3
So we believe the inside of the Earth is made of a heavy element
such as Iron or Nickel(density of Nickel = 8.9 gm/cm3)
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Density of Rocks 3 gm/cm3
The Density of Earth is 5.53 gm/cm3
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Density of Rocks 3 gm/cm3
The Density of Earth is 5.53 gm/cm3
Density of Iron/Nickel 8 gm/cm3
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Earth's Interior Structure
Average density
CrustMantleCore
5.5 g/cm3
3 g/cm3
5 g/cm3
11 g/cm3
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Earth must have been molten once, allowing denser material to sink, as it started to cool and solidify.
Density increases with depth !
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Density of Rocks 3 gm/cm3
The Density of Earth is 5.53 gm/cm3
Density of Iron/Nickel 8 gm/cm3
So we believe about ½ the Earth is a Rock-like material and the other ½ a heavy metal such as iron and nickel
The density of the Earth will be the average of the two:
5.52
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5.52
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