What is the composition of the Earth's core?
At the centre of the Earth is the core, which has two parts-
1. The Solid Inner core.
2.The Liquid Outer Core.
Source- Google Images
Earth has multiple layers. The ocean basins and the continents compose the crust, the outermost layer. Earth's crust is between three and 46 miles (five and 75 km) deep. The thickest parts are under the continents and the thinnest parts are under the oceans.
The Core- At the centre of the Earth is the core, which has two parts-
1. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km).
2. liquid, outer core composed of a nickel-iron alloy. It is about 1,355 miles (2,180 km) thick.
The inner core spins at a different speed than the rest of the planet. This is thought to cause Earth's magnetic field.
When charged particles from the solar wind collide with air molecules above Earth's magnetic poles, it causes the air molecules to glow, causing the auroras — the northern and southern lights.