Multiple choice

The inner portion of the earth is called core and it was largely made up of iron and ____?

  1. Calcium

  2. Magnesium

  3. Copper

  4. Nickel

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Earth's core is primarily composed of iron (about 85%) and nickel (about 10%), with smaller amounts of lighter elements. This metallic core generates Earth's magnetic field.