Which of the following is a wind deposited landforms?
Rock pedestal
Yardang
Deflation hollow
Loess
Correct answer is D
Loess is a wind-deposited sediment that is composed of fine particles of dust, clay and silt. It is a landform created by the action of wind. Other options like Rock pedestal, Deflation hollow, Yardang are formed by the action of water and erosion, not wind.
Which of the following distinguishes rotation from revolution?
A complete revolution takes 24 hours while rotation marks a year
Revolution causes day and night while rotation while rotation causes season
The earth rotates on its axis while it revolves round the sun on an elliptical orbit
Rotation causes variation in the lengths of day and night while revolution causes rising and falling of tides
Correct answer is B
Rotation is simply the movement of the earth on its axis. Rotation causes day and night. A complete rotation takes 24 hrs. Rotation causes rise and fall in tides.
Revolution is the movement of the earth around the sun in an elliptical orbit
Revolution causes changes in season
A complete revolution marks a year
Which of the following is an important line of longitude?
Antarctic Circle
Arctic Circle
Prime Meridian
Tropic of Cancer
Correct answer is C
The Prime Meridian is an important line of longitude. It is the line of 0 degree longitude, from which all other longitudes are calculated. It passes through Greenwich, London, and is used as the standard for the world time zone system.
Which of the following features is associated with the upper course of a river?
Levee
Meander
Delta
Waterfall
Correct answer is D
Waterfall is a feature of the upper course of a river. It has a steep slope which forms plunge pools.
More Hydroelectric Power projects should be constructed in Tropical Africa because
there is scanty rainfall
there are absence of waterfalls on rivers
skilled labour is scarce
there is an increasing demand for power
Correct answer is D
More Hydroelectric Power projects should be constructed in Tropical Africa because there is an increasing demand for power.