What is the composition of earth?

At the center of the Earth is the core, which has two parts. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km), according to NASA. It is surrounded by a liquid, outer core composed of a nickel-iron alloy. read more

Earth, Venus and Mars. To better understand Earth's composition and history, geologists sometimes compare our planet to other rocky planets in our solar system. Venus is a similar size to Earth and a little bit closer to the sun, while Mars is only about half the size of Earth. read more

1. Earth has a dipole magnetic field that deflects solar wind and protects earth’s surface from solar radiation Five Key Characteristics About Earth’s Structure: 3. Earth is made of a variety of minera read more