The heat that is present in Earth's mantle is made up of leftover heat from when the planet was formed, latent heat from the Earth's inner core and heat produced by the decay of radioactive isotopes. The majority of the heat is caused by the decay of isotopes such as potassium 40 and uranium 238.Know More
When an isotope breaks down, it sheds extra energy so that it can become more stable. This extra energy is radiated as heat and warms the mantle.
Earth's core contains liquid metal that expands a little bit every year. This expansion causes heat to spread to the mantle.
The Earth was created when gravity caused particles and hot gases to condense into a planet. Heat was also created by this process, and some of the heat is still around, warming the mantle.Learn more about Layers of the Earth
The Earth consists of four layers: crust, mantle, outer core and inner core. Each layer has its own properties and characteristics that separates it from the other layers.Full Answer >
Earth's core has two parts, a solid iron inner core and a molten outer core, which is composed of a nickel-iron alloy. The outer core begins about 1,800 miles under the crust.Full Answer >
The Earth's inner core is made up almost entirely of iron. The iron is extremely hot but does not melt, due to the high amount of pressure from the rest of the planet.Full Answer >
The earth's core is divided into two layers: the outer and inner core. The outer core borders the Earth's mantle and is approximately 1,430 miles in thickness. The inner core has a thickness of 750 miles, giving the core a combined thickness of 2180 miles.Full Answer >