what does the inner core consist of?

what is the density of the inner core?

what is the outer core?

what is the density of the outer core?

'the outer core is responsible for the..'

'the mantle is...

how thick is the mantle?

what is the crust made out of?

the depth of the crust varies between..

the average density of the crust ..

the mantle and crust are divided into what sections?

where is the lithosphere

asthenosphere is ..

mesosphere is..

what are the characteristics of continental crust

what are the characteristics of the oceanic plate?