what evidence supports the idea that earths core is made of an iron nickel alloy Why did this material sink to the floor while forming?

Answer 1

Evidence supporting the idea that Earth's core is composed of an iron-nickel alloy includes seismic studies showing that the outer core is liquid and has lower density than the inner core, which is solid and denser. Additionally, the Earth's magnetic field, generated by the movement of molten iron and nickel in the outer core, aligns with this composition. During Earth's formation, heavier elements like iron and nickel sank to the center due to their high density, a process known as planetary differentiation, which resulted in the formation of the core.