Layers Of Earth. Many years ago, when earth was formed, it was very hot. An outer silicate solid crust, a highly viscous asthenosphere and solid mantle.
Layers of the earth include the crust, upper mantle, lower mantle, outer core and inner core.
Students will learn that the earth is made of different layers with varying compositions and characteristics. In fact, if you were able to hold the earth in your hand and slice it in half, you'd see that it has multiple layers. This is the hottest layer of the earth, reaching a temperature of 7000 c; Earth comprises four separate layers.
