The statement "The present is the key to the past." was given by

• G.K. Gilbert

• James Hutton

• W.H. Davis

• Walter Penck

Which process of chemical weathering causes rusting of iron ?

• Carbonation

• Oxidation

• Hydration

• Dissilication

Sea floor spreading theory was propounded by

• Harry Hess

• Tuzo Wilson

• A.Hobbes

• D.L. Holms

• a-ii , b-i , c-iv , d-iii

• a-iii , b-iv , c-ii , d-i

• a-i , b-ii , c-iii , d-iv

• a-iv , b-iii , c-ii , d-i

Red Sea is an example of 

• Synclinal valley

• Volcanic structure

• Rift valley

• Eroded valley

6.

Which of the following factors is responsible for the planetary wind belts ?

• The tilt of earth's axis

• The rotation of earth

• High and low pressure belts

• Differential rate of heating of land and water

ASSERTION (A) : Remains of older mountain belts lie within the shields in few places.

REASON (R) : Older mountain belts in shield areas are composed of soft sedimentary rocks.

• (A) is correct , but (R) is wrong.

• Both (A) and (R) are correct.

• (A) is wrong , but (R) is correct.

• Both (A) and (R) are wrong.

The correct sequence of the following features towards sea from the coast is :

• Berm-Lowtide terrace-Longshore trough-Longshore bar

• Longshore trough-Longshore bar-Berm-Lowtide terrace

• Lowtide terrace-Berm-Longshore bar-Longshore trough

• Longshore bar-Lowtide terrace-Berm-Longshore trough

ASSERTION (A) : When sand arrives at a particular section of the beach more rapidly , than it is carried away , the beach is widened and built ocean ward.

REASON (R) : Th progradation process is everywhere common in the coastal environment.

• (A) is correct , (R) is wrong.

• (A) is wrong , but (R) is correct.

• Both (A) and (R) are correct

• Both (A) and (R) are wrong.

Who propounded the concept of "Poly Climax" ?

• Clement

• Tansley

• Whittaker

• Haeckel