In which direction would you draw arrows to show the movement of carbon through the process of respiration

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Someone me with this: a mineral' is determined by its actomic structure.

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun