LET’S REVIEW! What Are Fractions?. Let’s look at a pizza to understand more! 12 45 3 6.
Let’s look at the Earth
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Transcript of Let’s look at the Earth
Let’s look at the Earth
The Inside of the Earth is made of Several Layers
The Inside of the Earth is made of Several Layers
The Crust:A Thin Rock Material
The Inside of the Earth is made of Several Layers
The Mantle:A Dense and Mostly Solid Rock Material
The Inside of the Earth is made of Several Layers
The Outer Core:Liquid Iron and Nickel
The Inside of the Earth is made of Several Layers
The Inner Core:Solid Iron and Nickel
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
Why do the layers of the earth float on one another?
DENSITY
!!!!!
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!
Density
The Density of Earth is 5.53 gm/cm3
The Density of Earth is 5.53 gm/cm3
We know the surface of the Earth is covered with Rocks
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)
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)
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
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
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)
Density of Rocks 3 gm/cm3
The Density of Earth is 5.53 gm/cm3
Density of Rocks 3 gm/cm3
The Density of Earth is 5.53 gm/cm3
Density of Iron/Nickel 8 gm/cm3
Earth's Interior Structure
Average density
CrustMantleCore
5.5 g/cm3
3 g/cm3
5 g/cm3
11 g/cm3
Earth must have been molten once, allowing denser material to sink, as it started to cool and solidify.
Density increases with depth !
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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