[最新] earth's layers diagram 280229
The Four Layers The Earth is composed of four different layers Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top Because of this, the crust is made of the lightest materials (rock basalts and granites) and the core consists of heavy metals (nickel and iron)22 STRUCTURE OF THE EARTH S INTERIOR The above diagram (see fig 21) shows the concentric layers of the earth s interior The innermost layer surrounding the earth s centre is called core, which is about 3500 kms in radius Core is the most dense layer of the earth with its density range from 95 to 145 and sometimes even higherThe mesosphere, a colder and lower density layer with about 01% of the atmosphere; Structure Of The Earth A Level Geography Earth's layers diagram