Question

1. which of the following describes what earths core is made up of and why it has that composition? earths core is made of oxygen and silicon because they are the densest elements that make up the earth. earths core is made of iron and nickel because they are the least dense elements that make up the earth. earths core is made of iron and silicon because they are the least dense elements that make up the earth. earths core is made of iron and nickel because they are the densest elements that make up the earth.

Explanation:

During Earth's formation, denser elements sank to the center to form the core. Iron and nickel are the densest abundant elements in Earth's composition, while oxygen and silicon are lighter and form the crust and mantle. The correct option matches this geological process.

Answer:

Earth's core is made of iron and nickel because they are the densest elements that make up the Earth.