The Structure of the earth consist of
The earth is layered :
- Outer Solid Crust
- Liquid outer Core
- Solid Inner Core
How can we understand the structure of the Earth?
- By observing Topography
- Rock formation
- Samples brough to the surface by volcanos
- experiments by scientists
0 - 35 km ___________
_________ 35 - 60 km
Upermost part of mantle 35 - 60 km
? - ? km is the Mantle
In the Mantle is the
210 - 270 km ___________
660 - 2890 km _____________
35 - 2890 km is the Mantle
In the Mantle is the
210 - 270 km Upper Mantle
660 - 2890 km Lower Mantle
How many km down is the OUTER CORE
2890 - 5150 km
How many kilometres down is the INNER CORE
5150 - 6360 km
What are the 2 layers in the earths crust?
Oceanic Floor (Sima)
- Continuous thin layer around the earth
- Hard heavy igneous rock like basalt
Continental Crust (Sial)
- Not continuous but thicker
- Lighter rock made of silicate, like granite
How thick is the earth crust?
0 - 35 km deep
Where do we find the Crust
It is the outside layer of the earth
What is the Sima
It is the thin parts of the oceanic crust
It is continuous layer around the earth
What is the Sima (crust) made of?
Hard ifneous rock like basalt
What is the Sial?
It is the thicker continental crust on earth
It is not continuous
What is the Sial made of
This layer is lighter and made of silicate rock like granite
How old are most rocks on the earths crust?
less than 100 million yrs
How old are the oldest minerals on earth?
What does this indicate
4.4 Billion yrs
Indicates that earth has had a crust for 4.4 billion yrs
How deep is the Mantle
Depth of 2890 km
What is the thickest layer in the earth?
Mantle is divided in 2 name it
and name what divides it
Divided by the Transition Zone
What is the Mantle made of?
Rich in iron and magnesium
Mostly solid but with high temp it cause a thick mass of flowing magma
Is there a difference in the Upper and Lower Mantle
As you move deeper the pressure increases
The lower part is more denser than the Upper part
Name the 2 parts of the core
Solid inner Core - radius 1220 km
Liquid outer core 3400 km
What is the inner core made of
Nickel and iron
How did the core form 4.5 billions yrs ago
Due to melting denser substances sinked to the centre
While less dense material migrated to crust
What surrounds the inner core that is made of nickel and iron and trace amounts of lighter elements
What is the inner most part of the core contain / rich of