Can someone please answer these questions on the earths layers.?

Question

Which of the earths layers is thickest.

Which layer is the hottest.

Which layer is mainly made up of iron and nickel.

Which layer is a liquid.

Which layer is solid.

Thanks in advance

Answer 1

Which of the earths layers is thickest: Crust

Which layer is the hottest.: Core

Which layer is mainly made up of iron and nickel.:Crust

Which layer is a liquid.: Mantle

Which layer is solid.:Crust

Answer 2

Please be aware that the crust of the earth is the thinnest - not the thickest. There is a table in the reference below. The only layer which is liquid is the outer core.  The core, inner and outer consists of an alloy of iron and nicel, and the inner core is the hottest.