The Earth's Mantle
Going beyond the Earth’s crust, next we see the mantle. The mantle is about 1,800 miles deep, and is made of a thick solid rocky item that acts as about 85% of the total weight and mass of the Earth. The first 50 miles of the mantle are believed to have very hard rigid rock. The next 150 miles or so is believed to be super-heated solid rock. However, there are two types of mantle, the upper and lower. The Earth's upper mantle is a highly sticky layer, which lies between the crust and lower mantle. The lower mantle is the largest connected area of the inside and plays a major role in controlling the thermal evolution of the planet. .
A video of information about the Earth's Mantle.