Layers Of The Earth Flashcards
What is the uppermost layer of the earth called?
Crust
What is the name of the crust and the uppermost layer of the mantle?
Lithosphere
How deep is the mantle?
2900 km
What are the tectonic plates?
The earths surface that is broken into large pieces
What is the state of the inner core?
Solid with a temperature of 5700 degrees Celsius
What is the temperature of the outer core?
Around 4000 degrees Celsius
How deep is the continental crust and what is it made of?
10 - 50 miles of thick granite
What density does oceanic crust have?
High density so it floats on the mantle like wood
What does continental crust form?
The land
How thick is oceanic crust and what is it made of?
1 - 3 miles deep, made of basalt (this basalt is chemically different to the basalt found in the mantle)
What is a plume?
A body of magma that rises from the earths mantle into the crust
What is the mantle made up of?
Semi molten rock called magma
What is the inner and outer core made of?
Iron and nickel
How thick is the inner core?
1250km
How thick is the outer core?
Around 2200km thick
What layers of the earth does the lithosphere cover?
Crust and the upper most part of the upper mantle
What does the asthenosphere cover?
The top part of the mantle just below the lithosphere
How many parts is the mantle made up of
2 parts but the upper mantle in then split into another two parts
