In the structure of planet Earth, below the Mantle, the core is mainly made up of which one of the following ?

'Mons Scale' is used to indicate the ?

• [A] Degree of viscosity of a liquid
• [B] Degree of brittleness of a substance
• [C] Degree of hardness of minerals
• [D] Degree of electricity of a material

We always see the same face of the Moon, because ?

• [A] It is smaller than earth
• [B] It revolves on its axis in the direction opposite to that of the earth
• [C] It takes equal time for revolution around the earth and rotation on its own axis
• [D] It rotates at the same speed as the earth around the sun

The inexhaustible source of energy of the stars is due to ?

• [A] Conversion of hydrogen to helium
• [B] Conversion of helium to hydrogen
• [C] decay of radioactive elements
• [D] excess of oxygen that helps burning and release of energy

Which one of the following features is not a product of volcanism ?

• [A] An Erratic
• [B] A Dyke
• [C] A Crater
• [D] A Geyser

Continents have drifted apart because of ?

• [A] Volcanic eruption
• [B] Tectonic activities
• [C] Folding and Faulting of rocks
• [D] All of the above