Earth's outermost layer is composed of several tectonic plates, which glide over the interior layer of earth called the mantle. As these plates move around, they can cause landmasses to inch ...

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

In essence, it's where hot stuff happens. Earth's upper mantle is separated into two layers, the lithosphere and the ...