The temperature at the centre of the Earth is estimated to be 4530°C
The average density of the Earth is 5.517g/cm3
The mass of the Earth including the atmosphere is 5.976 x 1021 tonnes.
The Earth is made up of several layers. The measurements of which are below.
|polymorph||melting point (°C)||comments|
|form I||17.3||Produced by rapid cooling of melt. Successive polymorphs are then obtained by heating at 0.5 °C/min.|
|form 2||23.3||Produced by cooling melt at 2 °C/min or rapid cooling of melt followed by storing from several minutes up to one hour at 0 °C. This form is stable at 0 °C for up to 5 hours.|
|form 3||25.5||Produced by solidification of melt at 5-10 °C or transformation of form 2 by storing at 5-10 °C.|
|form 4||27.3||Produced by solidification of melt at 16-21 °C or transformation of form 3 by storing at 16-21 °C.|
|form 5||33.8||Produced by tempering (cooling then reheating slightly while mixing). The most desirable form with good gloss, texture, and "snap".|
|form 6||36.3||The transformation of form 5 after spending 4 months at room temperature. Leads to the white, dusty appearance.|
|Density g/cm3||% of mass||% of volume||Thickness (km)|
|Upper Crust||2.6||0.27||1 (with lower crust)||21 (with lower crust)|
|Lower Crust||2.9||0.23||1 (with upper crust)||21 (with upper crust)|