Down folded layers of chalk or limestone sandwiched between impermeable rock layers and containing trapped water is referred to as

A. river basin

B. oasis

C. artesian

D. watershed

The seasonal variation in the volume of water in a river is known as the

A. regime

B. drainage

C. pattern

D. waterdivide

Which of the following is not a process of chemical weathering?

A. hydrolysis

B. oxidation

C. carbonation

D. frost action

The plains formed when the slopes of mountains are worn back in arid and semi-arid regions by mechanical weathering is called

A. pediplains

B. deflation plains

C. alluvial plains

D. outwash plains

'They are crescentic or moon-shaped and occur individually or in groups'. The above description refers to

A. yardangs

B. barchans

C. seifs

D. rock pedestals

Lines joining places of equal sunshine duration on maps are known as

A. isohyet

B. isoneph

C. isobar

D. isohel

A well will always contain water if it is dug

A. above the water table

B. below the water table

C. to reach sand bearing water

D. below the earth's basin

Which of the following is not a factor affecting the movement of ocean currents?

A. the planetary winds

B. differences in temperatures

C. shape of the land mass

D. differences in the rate of evaporation

When there is a large difference in the reading of the dry and wet bulb thermometers, it shows that relative humidity is

A. low

B. moderate

C. 100%

D. 0%

The peeling off of the surface layers of rounded boulders during mechanical weathering is called

A. frost action

B. exfoliation

C. solifluction

D. rock fragmentation