151.

Landslides involve :

• Downslope movement of individual rock blocks which is usually not perceptible.

• Rapid perceptible movement of relatively dry mass of earth debris or bed rock.

• Slow to very rapid movement of water saturated rock debris.No

• Slow-flowing downslope masses of rock debris saturated with water.

Which of the following pairs is not a correct match of desert and country/continent ?

• Atacama desert-South America

• Gobi desert-Central Asia

• Sonoran-West Asia desert

• Great Victorian-Australia desert

One of the proponents of the turbidity current theory of the origin of submarine canyons was

• Daly

• Dana

• Gregory

• Salis

The term peneplain refers to

• A level surface formed in the old age of fluvial cycle

• A level surface formed by wind erosion

• A plain formed by marine erosion

• A plain formed by joining flood-plains.

In the process of erosion , the removal of material by solution is called

• Attrition

• Corrassion

• Corrosion

• Sapping

Who is usually given the credit for establishing the validity of the idea that there was an ice age during which ice sheets covered much of northern Europe ?

• Agassiz

• Ramsay

• Jukes

• Penck

Most of the details of our present topography belong to the 

• Pre-cambrian era

• Paleozoic era

• Mesozoic era

• Cenozoic era

Chemical weathering is more effective than mechanical weathering in

• Semi arid region

• Arid region

• Coastal region

• Cool temperate region

A drainage system which is not related to the structure of the region where it occurs is called a 

• Radial drainage pattern

• Trellis drainage pattern

• Superimposed drainage pattern

• Dendritic drainage pattern

ASSERTION (A) : The work of wind as an agent of gradation is not as widespread as that of water.

REASON (R) : I t is effective only in the desert regions of the world where rainfall is scanty and soil particles are loose.

• Both (A) and (R) are true and (R) is the correct explanation of (A).

• Both (A) and (R) are true but (R) is not the correct explanation of (A).

• (A) is true but (R) is false.

• (A) is false but (R) is true.