What is the meaning of internal molding forces of the Earth? Explain any two.

These forces act inside the earth and cannot see externally. These are produced by the contract and expansion of the rocks due to the temperature in the depth under the earth surface by the convection currents produced in the mantle present inside the earth.

● When internal molding forces act perpendicular to the earth crust, one portion of the Earth surface get elevated and one portion gets depressed. This lead to the formation of continents, island, plateaus, sea etc

● When internal moulding forces act horizontal to the earth crust, wave is produced. As a result fold, faults and snaps are produced on the surface and valley and mountain are formed. The best example is, Mount Everest (fold mountain).

In the given figure shows the formation of fold mountain by horizontal internal moulding forces.