What is the composition of Earth's core?
a. Very dense
b. Mostly silicate material
c. Mostly iron
d. Very liquid
c. Mostly iron
The composition of Earth's core is primarily made up of iron. Option c, "Mostly iron," is the correct answer. The core is divided into two parts: the outer core, which is molten or liquid, and the inner core, which is solid due to high pressures. It is important to note that the core is not very liquid, as mentioned in option d.
The composition of Earth's core is mostly iron, so the correct answer is c. Mostly iron.
To obtain this answer, scientists have utilized various methods such as seismic studies, which involve analyzing the behavior of seismic waves produced by earthquakes or explosions. These waves can travel through the different layers of the Earth, providing valuable information about the Earth's interior.
One technique involves studying how seismic waves change as they pass through the Earth's core. By analyzing these changes, scientists can approximate the density and composition of the core. In this case, studies have shown that the Earth's outer core consists mostly of liquid iron, while the inner core is solid iron.