Day-736 | Daily MCQs | UPSC Prelims | GEOGRAPHY

Answer: B
● The term “Silver Dividend” refers to the potential economic benefits derived from the aging population (often referred to as the “silver generation”).
● Instead of viewing an aging population as a burden, the concept emphasizes leveraging the skills, experience, and continued economic contributions of older adults, particularly as they live longer and healthier lives.

Answer: B
Explanation:
● Wegener suggested that the movement responsible for the drifting of the continents was caused by pole-fleeing force and tidal force.
● The polar-fleeing force relates to the rotation of the earth. You are aware of the fact that the earth is not a perfect sphere; it has a bulge at the equator.
● This bulge is due to the rotation of the earth. The second force that was suggested by Wegener — the tidal force — is due to the attraction of the moon and the sun that develops tides in oceanic waters.
● Wegener believed that these forces would become effective when applied over many million years.
● However, most scholars considered these forces to be totally inadequate.

Answer: C
Explanation: Gulf Stream is a warm current
Ocean current:
● Ocean currents can be classified based on temperature: as cold currents and warm currents.
● Cold currents bring cold water into warm water areas. These currents are usually found on the west coast of the continents in the low and middle latitudes (true in both hemispheres) and on the east coast in the higher latitudes in the Northern Hemisphere.

● Warm currents bring warm water into cold water areas and are usually observed on the east coast of continents in the low and middle latitudes (true in both hemispheres). In the northern hemisphere they are found on the west coasts of continents in high latitudes.
● Oyashio, Labrador and Falkland currents are the cold currents while the Gulf Stream is a warm current.

Answer: B
Explanation: Pairs 1 and 2 are matched correctly
Pair 1 is matched correctly:
Bird’s foot Delta:
● The Mississippi river (U.S.A.) has a bird’s foot delta, with several main branches like the foot of a bird extending into the Gulf of Mexico.
Pair 2 is matched correctly:
● The Nile (Egypt), Ganges and Mekong have the fan-shaped arcuate deltas with numerous distributaries.
Pair 3 is matched incorrectly:
● Rivers like Amazon (Amazon), Ob, and Vistula have their deltas partly submerged in coastal waters to form estuarine deltas.
Pair 4 is matched incorrectly:
● Rivers like the Ebro of Spain have tooth-like projections at their mouths. These are known as cuspate deltas.

Answer: A
Explanation: Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I
HEAT ZONES OF THE EARTH
● Torrid Zone: The mid-day sun is exactly overhead at least once a year on all latitudes in between the Tropic of Cancer and the Tropic of Capricorn. This area, therefore, receives the maximum heat and is called the Torrid Zone.
● Temperate Zone:The mid-day sun never shines overhead on any latitude beyond the Tropic of Cancer and the Tropic of Capricorn. The angle of the sun’s rays goes on decreasing towards the poles. As such, the areas bounded by the Tropic of Cancer and the Arctic Circle in the Northern Hemisphere, and the Tropic of Capricorn and the Antarctic Circle in the Southern Hemisphere, have moderate temperatures. These are, therefore, called Temperate Zones.
● Frigid Zone:Areas lying between the Arctic Circle and the North Pole in the Northern Hemisphere and the Antarctic Circle and the South Pole in the Southern Hemisphere, are very cold. It is because here the sun does not rise much above the horizon. Therefore, its rays are always slanting and provide less heat. These are, therefore, called Frigid Zones (very cold).