world physical geography section 2 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Humboldt, Oyashio and Canaries are the cold ocean currents while Brazil current is the warm Ocean current.

Answer: (d)

The amount of precipitation in a given region depends on the amount of available atmospheric water vapour (precipitable water), as well as on the processes that cause condensation, in particular the uplift of air associated with cyclones and fronts, as well as convection.

If all the water vapour in the atmosphere were condensed, the earth’s surface would be covered, on average, with a 25 mm layer of water.

However, since the amount of water vapour the atmosphere can hold decreases with decreasing temperature, the amount of water that can be condensed from the air generally decreases with latitude.

In general, the amount of precipitable water in the humid tropics is more than 40 mm, while near the pole; it is often less than 5 mm.

The Polar Regions are the coldest places on Earth and differ the most from every other habitat on the planet. During the summer months, the days receive 24 hours of pure sunshine, but during the winter, the sun is barely seen at all.

There is very little rainfall in the Polar Regions, mainly because it is so cold, that there is very little water in the air. The average annual rainfall is less than 250 mm.

Answer: (c)

In the Netherlands, 50 per cent of the country is below sea level with the lowest point being 22 feet (6.7 meters) below sea level.

Through a complex system of dikes, pumps and sand dunes along the coast, the Netherlands stays above water. In fact, it has one of the most sophisticated anti-flood systems in place anywhere in the world.

Answer: (b)

Sirocco originates in the Sahara and blows across the Mediterranean Sea into southern Europe. It arises from a warm, dry, tropical airmass in the Arabian or Sahara deserts that is pulled northward by lowpressure cells moving eastward across the Mediterranean Sea.

Answer: (a)

The Pacific Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 40,000 km horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements.

The Ring of Fire has 452 volcanoes and is home to over 75% of the world’s active and dormant volcanoes. It is sometimes called the circum-Pacific belt or the circumPacific seismic belt. About 90% of the world’s earthquakes and 81% of the world’s largest earthquakes occur along the Ring of Fire.

The next most seismic region (5–6% of earthquakes and 17% of the world’s largest earthquakes) is the belt which extends from Java to Sumatra through the Himalayas, the Mediterranean, and out into the Atlantic. The Mid-Atlantic Ridge is the third most prominent earthquake belt.

Answer: (a)

Cyclone Sidr was a tropical cyclone that resulted in one of the worst natural disasters in Bangladesh on 15 November 2007. 3,447 deaths were blamed on this Category-5 cyclone on the Saffir-Simpson Scale.