XI:Assignment on physical properties of minerals

Continental Drift Taylor hypothesis Wegener hypothesis evidences of hypothesis

I.Plate tectonics There are seven major plates: The plates are continental crust and  oceanic crust        1.The African plate- somali plate,       2.Antarctic plate      ...

Age of the earth is calculated by two methods – indirect and direct method I. Indirect method: 1.)Varved clock method 2) Sedimentation method 3) Salinity...

Two hypothesis on the origin of the earth: 1.Nebular hypothesis on the origin of the earth 2. Bi-parent origin of the planets