Composition of Earth's layers Flashcards
What is the core
consists of iron and nickel
Temperature =6,200 degreed Celsius
Inner core is soldi 1,250 km thick
Outer core is semi moltent , 2,200 km thick
What is the mantle
- consists of silicate rocks, rich in magnesium, making up 84%
of earths volume - 2,900km thick
- temperatures of 1000 degrees c near crust, 4000 degrees c
near core - Semi Molten
What is the crust
Thin outer layer of the Earth consist of
- Oceanic crust, 6-10km thick, made of basaltic rock such as
silica and magnesium created into sima
- Continental crust, 70 km thick made of granite rock made up
of silica and alumni created into sail
What is the lithosphere
The lithosphere is the rigid outer layer of the Earth consisting of the crust and soil outer most layer of the upper mantle
What is the Moho discontinuity
The Moho Discontinuity is the boundary between the crust and the mantle
What is the asthenosphere
A layer between the upper and mantle and the lithosphere