Question

question 3 (1 point) why does the earth have a nickel - iron core at its center, surrounded by silicate mantle? a metal core occurs at the center of most planets the core formed first from metallic meteorites. the core material, because it is more massive, sank to the center of the earth due to the process of density stratification silicates are les rigid than metal, so the mantel and crust flowed outward to the exterior the intense pressure at the center of the earth caused the primordial nebular material to transmutate into metal

Explanation:

During the Earth's formation, denser materials like nickel - iron sank to the center due to density stratification while less - dense silicate materials formed the mantle around it. Option A is a general statement without explaining Earth's specific case. Option B is incorrect as the core formation was more complex than just from metallic meteorites. Option D is wrong as the reason for the mantle - crust position is density not rigidity. Option E is not true as there is no such transmutation due to pressure from primordial nebular material to metal.

Answer:

C. The core material, because it is more massive, sank to the center of the Earth due to the process of density stratification