The hottest layer of the Earth is the core. The core itself contains two layers: the outer core and the inner core. Of these two, the inner core is the hottest at between 9,000 and 13,000 degrees Fahrenheit. More »

The thermosphere is the hottest layer of the atmosphere. It extends from 80 kilometers above the surface of the Earth up to 600 kilometers and can heat up to 1,500 degrees Celsius because it’s very sensitive to solar act... More »

The hottest country in the world is Libya, where temperatures higher than 136 degrees Fahrenheit are recorded. The country's terrain is almost completely desert, with little rainfall and very hot temperatures year round. More »

Earth is geologically active because its internal heat keeps the outer core and lithosphere molten, encouraging plate movement and volcanic activity. Earth's crust consists of tectonic plates floating atop the malleable ... More »

While iron and nickel form the liquid outer layer of Earth's core, the solid inner core is made mostly of iron. The iron in Earth's core is what gives the planet its magnetic field. More »

The outer core is part of the core, which is one of the three major layers of the Earth. The core is the deepest and hottest layer and is mostly composed of metals, and it is beneath the Earth's mantle. The outer core is... More »

Heat radiating from Earth's core ultimately drives geological activity. Two major energy sources drive this flow of heat. First, some heat is left over from the planet's creation 4.5 billion years ago. Second, the decay ... More »