Mainly iron and nickel.
Rocks and metals
mantle
Weekly operation
liquid iron
Simple answer: iron meteorites.
material is hotter and denser
on the surfaceNote:Since the earth's composition is not homogeneous, the gravitational acceleration onthe surface is probably less than what it is some small distance below the surface,but it's certainly greater than at the center.
solid
The Chemical Composition of the Earth's atmosphere is important because it holds the Earth together.
mantle
hard rock
Water
Weekly operation
kum kum paste
Silicon
kum kum paste
nope i dont know really
the center of the earth