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 ...

The atmosphere has four layers. The troposphere is the layer closest to the surface of the Earth. Next is the stratosphere, which is where commercial airplanes fly. Further out is the mesosphere ...

The Earth's structure. Planet Earth is not a solid ball of rock, it's made up of different layers. The crust of ... from solid iron and nickel. In this diagram, the red lines represent the edges ...

A layer of charged particles, called the ionosphere, surrounds Earth, extending from about 50 to 400 miles above the surface of the planet. Disclaimer: AAAS and EurekAlert! are not responsible for ...

Alternatively, as shown in the diagram, convection currents under the Earth’s crust transfer heat, which rises through the surface and cools back down in a circular motion. The convection ...