What is the thickness of the Earth's inner core?

What is the thickness of the Earth's inner core?

Which of the following is a major difference between Earth's inner core and outer core? A. The inner core is liquid, and the outer core is solid. B. The inner core is solid, and the outer core is liquid. C. The inner core is gas, and the outer core is solid. D. The inner core is solid, and the outer core is gas.

Which is Earth's thinnest layer? (a) crust (b) inner core (c) mantle (d) outer core

record data about each of Earth's layers. The mantle, outer core and inner core are very thick layers, so collect two sets of data for each one.

What two important elements constitute the earth's inner most core?a.Magma and lavab.Potassium and Magnesiumc.Granite and basaltd.Nickel and Iron