Geography Mixed Quiz: Set 6

The correct answer is B, Saturn. Saturn is a huge ball of hydrogen and helium spread over an enormous volume, and its average density is less than that of water. This makes it the least dense planet of the solar system, and the picture of Saturn floating in water is the standard way the fact is taught. Saturn is also famous for its system of bright rings and for Titan, its largest moon.

Option A, Jupiter, is the largest and heaviest planet, but it is more tightly packed than Saturn and denser than water. Option C, Neptune, is a distant ice giant and denser still. Option D, Mercury, is a small rocky planet with a large iron core and is among the densest of all. Pair the two records in your memory: Jupiter the largest, Saturn the lightest for its size.

The correct answer is D, Altitude and slope determine the rate of humus formation. Altitude and slope, which together make up relief, decide how much soil collects at a place, not how fast humus forms. Humus is the dark organic matter made when dead leaves and animals rot, and its rate of formation depends on climate and on the living things in the soil: plants, animals and micro-organisms. NCERT lists five factors of soil formation. Parent rock gives the soil its colour, texture and minerals; climate, meaning temperature and rainfall, sets the rate of weathering and humus formation; relief, meaning altitude and slope, controls how much soil accumulates; time decides the thickness of the soil profile; and flora, fauna and microbes affect humus. A is wrong as a choice because temperature and rainfall really do control weathering. B is wrong because time does decide how thick the profile grows. C is wrong because parent rock does fix the colour of soil. Exam tip: relief = accumulation of soil; climate and organisms = humus; parent rock = colour and texture; time = thickness.

The correct answer is D, Aravalli Range. Guru Shikhar, about 1,722 m high on Mount Abu in the Sirohi district of Rajasthan, is the highest peak of the Aravalli Range. The Aravallis are among the oldest fold mountains in the world and have been worn down into low hills. They run about 700 km from Gujarat through Rajasthan and Haryana to Delhi, where the Delhi Ridge is their last part. The range acts as a barrier to the spread of the Thar Desert towards the east, and Mount Abu is the only hill station of Rajasthan. A is wrong because the Vindhyas are a lower range in central India and Guru Shikhar is not part of them. B is wrong because the highest peak of the Western Ghats is Anamudi (2,695 m) in Kerala. C is wrong because the highest peak of the Satpura Range is Dhupgarh, near Pachmarhi in Madhya Pradesh. Exam tip: Aravalli = Guru Shikhar, Satpura = Dhupgarh, Western Ghats = Anamudi, Nilgiris = Doddabetta.

The correct answer is C, Neither I nor II. Both pairs are reversed: in Punjab rice is a commercial crop, while in Odisha it is a subsistence crop. The same crop can be commercial in one state and subsistence in another; it depends on why the farmer grows it. A subsistence crop feeds the farmer's own family, and a commercial crop is grown mainly for sale. Punjab and Haryana farmers do not eat much rice, yet they grow it on irrigated land with high-yielding seeds and sell almost all of it to the government at the minimum support price. In Odisha, West Bengal and Assam rice is the staple food, grown mostly on small rain-fed plots for the family's own kitchen. A is wrong because Punjab rice is sold, not eaten at home, so it is commercial. B is wrong because Odisha rice is largely eaten by the growers, so it is subsistence. D fails because neither pair is correct. Exam tip: NCERT line to remember, rice is commercial in Punjab and Haryana but subsistence in Odisha.

The correct answer is C, Nilgiri Hills. Doddabetta, about 2,637 metres high, is the highest peak of the Nilgiri Hills and stands close to Ooty (Udhagamandalam) in Tamil Nadu. The Nilgiris are the place where the Western Ghats and the Eastern Ghats meet, which is why they are often described as a knot of the two ranges. In Kannada, 'dodda betta' simply means 'big mountain', an easy way to remember that it is the top of the Nilgiris. The Nilgiri Biosphere Reserve, India's first biosphere reserve, is spread around these hills. Option A is wrong because the Vindhyas are a low range of central India whose peaks stay well below 1,000 metres. Option B is wrong because the highest point of the Satpura Range is Dhupgarh near Pachmarhi in Madhya Pradesh, about 1,350 metres. Option D is wrong because the Anamalai Hills of Kerala hold a different peak, Anamudi, about 2,695 metres, the highest point of South India. Exam tip: Anamudi (Anamalai, Kerala) is the highest in South India; Doddabetta (Nilgiri, Tamil Nadu) is the highest of the Nilgiris.

The correct answer is C, a-iii, b-i, c-ii, d-iv. Gua and Noamundi, in West Singhbhum district of Jharkhand, are well-known iron ore mines of the Singhbhum–Keonjhar belt, which feeds steel plants such as the one at Jamshedpur. Balaghat district in Madhya Pradesh has the Malanjkhand copper mine, one of India's largest open-cast copper mines. The Amarkantak plateau, where the Narmada and the Son rise, has rich bauxite deposits, the ore of aluminium. Nellore district in Andhra Pradesh is a leading mica belt of India, along with Koderma in Jharkhand and Bhilwara in Rajasthan. Option A is wrong because it gives copper to Amarkantak and bauxite to Balaghat. Option B is wrong because it places iron ore at Amarkantak and bauxite at Gua and Noamundi. Option D is wrong because it puts iron ore at Balaghat, copper at Gua and Noamundi, and mica at Amarkantak. Exam tip: Gua–Noamundi iron ore, Malanjkhand (Balaghat) copper, Amarkantak bauxite, Nellore and Koderma mica.

The correct answer is B, Darjeeling Hills. The Mahananda rises in the Darjeeling hills of West Bengal, near Kurseong, at a height of about 2,100 metres. It flows down through Siliguri, enters Bihar near Kishanganj, and then passes into Bangladesh, where it joins the Ganga (called the Padma there). It is a left-bank tributary of the Ganga, and its own tributaries include the Balason and the Mechi. The Mahananda Wildlife Sanctuary near Siliguri is named after it, and the river is a reason why Siliguri and the 'chicken's neck' corridor are so important for connecting the North-East. A is wrong because the Chota Nagpur Plateau gives rise to the Damodar and Subarnarekha, not the Mahananda. C is wrong because the Kaimur hills are near the Son valley in Bihar and Madhya Pradesh. D is wrong because Nanda Devi in Uttarakhand feeds the Rishi Ganga and the Alaknanda system. Exam tip: Mahananda = Darjeeling hills, flows through Siliguri, left-bank tributary of the Ganga; Damodar and Subarnarekha = Chota Nagpur.

The correct answer is A, Borneo. Of the four islands listed, Borneo has the largest area; it is the third-largest island in the world and the largest in Asia. The world's top islands by area run Greenland, New Guinea, Borneo, Madagascar, Baffin and Sumatra, with Australia counted as a continent rather than an island. Borneo lies in South-East Asia and is the only island shared by three countries: Indonesia, whose part is called Kalimantan, Malaysia, with Sabah and Sarawak, and the small nation of Brunei. Option B is wrong because Great Britain, though the largest island in Europe, ranks only around ninth in the world. Option C is wrong because Madagascar, off the east coast of Africa, is the fourth-largest, just behind Borneo. Option D is wrong because Sumatra, also in Indonesia, is sixth, well behind Borneo. Exam tip: remember the top four as Greenland, New Guinea, Borneo, Madagascar, and that Borneo belongs to three countries.

The correct answer is C, Oxbow lake. When a river cuts across the narrow neck of a loop and silt seals both ends, the old loop is left behind as a curved lake. Meanders form in the middle and lower course, where a river flows slowly over flat land, cutting its outer bank and building up its inner bank. Over time the neck of a loop grows thinner until a flood breaks through it and the river takes the shorter path. The abandoned bend is shaped like the U-shaped collar of an ox's yoke, which gives the lake its name; Kanwar Lake (Kabar Tal) in Bihar was left behind in this way by the Burhi Gandak. Option A is wrong because potholes are round holes drilled into a rocky bed by pebbles swirling in a fast upper-course stream. Option B is wrong because levees are raised banks of silt dropped along the river during floods. Option D is wrong because a flood plain is the wide flat land built by repeated floods, not a cut-off loop. Exam tip: meander plus cut-off gives an oxbow lake, a mark of the river's old stage.

The correct answer is A, Orange River. The Orange River is the longest river of South Africa, about 2,200 km long. It rises in the Drakensberg mountains of Lesotho, flows west across South Africa and falls into the Atlantic Ocean at Alexander Bay. For part of its course it forms the border between South Africa and Namibia. Its main tributary is the Vaal, and the Augrabies Falls lie on the Orange. The Limpopo is the other big river of South Africa, flowing east into the Indian Ocean. B is wrong because the Nile, the longest river in the world, flows north through countries such as Uganda, Sudan and Egypt into the Mediterranean Sea. C is wrong because the Congo flows through Central Africa, crosses the Equator twice and enters the Atlantic. D is wrong because the Niger flows through West Africa (Guinea, Mali, Niger and Nigeria) into the Gulf of Guinea. Exam tip: South Africa = Orange and Limpopo; Nile = north-east Africa; Congo = crosses the Equator twice; Niger = West Africa; Zambezi = Victoria Falls.

The correct answer is C, Silchar to Porbandar. The East-West Corridor is one arm of the National Highways Development Project, planned together with the North-South Corridor from Srinagar to Kanyakumari. It runs for about 3,300 km from Porbandar on the Saurashtra coast of Gujarat, through Rajasthan, Madhya Pradesh, Uttar Pradesh, Bihar and West Bengal, and across the narrow Siliguri corridor into Assam, ending at Silchar in the Barak valley. The two corridors cross at Jhansi in Uttar Pradesh, a point that exams love to ask. In Rajasthan the route passes Udaipur, Chittorgarh and Kota, so it matters for Rajasthan papers too. Option A is wrong because neither Imphal nor Ahmedabad is an end point of the corridor. Option B is wrong because Dimapur and Vadodara are not its terminal cities. Option D is wrong because the corridor does not end at Kandla, a port on the Gulf of Kutch; its western end is Porbandar. Exam tip: North-South = Srinagar to Kanyakumari; East-West = Silchar to Porbandar; they meet at Jhansi.

The correct answer is D, Granite. Granite forms when magma cools slowly deep inside the Earth's crust, so it is an intrusive or plutonic igneous rock. Slow cooling gives the minerals time to grow, which is why granite shows large, clearly visible grains of quartz, feldspar and mica. It is hard and long-lasting, so it is widely used in buildings, monuments and kitchen tops. Option A is wrong because sandstone is a sedimentary rock made of sand grains pressed and cemented together; the Red Fort in Delhi is built of red sandstone. Option B is wrong because slate is a metamorphic rock formed when shale is changed by heat and pressure. Option C is wrong because basalt is an extrusive igneous rock: lava cools quickly on the surface, giving fine grains, and the Deccan Traps are made of basalt. Exam tip: intrusive means it cools inside, slowly, with big crystals (granite); extrusive means it cools outside, fast, with fine grains (basalt).

The correct answer is B, Nagaland. In the 2011 Census, Nagaland was the only state whose population actually fell, with a decadal growth rate of about minus 0.6 per cent for 2001–2011, the lowest in India. Experts linked the fall mainly to the correction of an inflated count in 2001, when Nagaland had shown one of the fastest growth rates in the country. For India as a whole, decadal growth was 17.7 per cent, down from 21.5 per cent in 1991–2001, and among states Meghalaya grew the fastest, at about 27.9 per cent. Option A is wrong because Arunachal Pradesh grew by about 26 per cent, well above the national average. Option C is wrong because Madhya Pradesh grew by about 20.3 per cent. Option D is wrong because Punjab grew by about 13.9 per cent, which is low but still positive. Exam tip: Census 2011 decadal growth, lowest Nagaland (negative), highest state Meghalaya, India 17.7 per cent.

The correct answer is D, (a) and (b). Mount Kilimanjaro and Fujiyama were both built up by volcanic eruptions, while the Alps were formed by folding. Kilimanjaro in Tanzania is the highest mountain in Africa, and Fujiyama, or Mount Fuji, is the highest mountain in Japan. Both are cone-shaped mountains made of layers of lava and ash piled up over many eruptions. The Alps in Europe are young fold mountains, raised when the African plate pushed against the Eurasian plate and the rock layers crumpled, much like the Himalayas. A is wrong because it includes the Alps, which are fold mountains. B is wrong for the same reason, even though Fujiyama is volcanic. C is wrong because the Alps alone are not volcanic, and this option leaves out both of the real volcanic mountains. Exam tip: volcanic, Kilimanjaro and Fujiyama; fold, Himalayas, Alps and Andes; block, the Vosges and the Black Forest along the Rhine valley.

The correct answer is A, Andhra Pradesh. Andhra Pradesh lies on the east coast of India, so its shoreline faces the Bay of Bengal. Its coast runs from the border of Odisha in the north to Tamil Nadu in the south, and the Godavari and Krishna rivers build rich deltas on it before entering the sea. The states with a coast on the Bay of Bengal are West Bengal, Odisha, Andhra Pradesh and Tamil Nadu, along with the union territories of Puducherry and the Andaman and Nicobar Islands. The stretch of the east coast in Andhra Pradesh is often called the Northern Circars, while the southern part in Tamil Nadu is the Coromandel Coast. B is wrong because Karnataka lies on the west coast and faces the Arabian Sea. C is wrong because Kerala also has its coast on the Arabian Sea, not the Bay of Bengal. D is wrong because Telangana is a landlocked state with no coastline at all. Exam tip: east coast states from north to south, West Bengal, Odisha, Andhra Pradesh, Tamil Nadu; Telangana has no sea coast.

The correct answer is B, North Atlantic Ocean. The Sargasso Sea lies in the middle of the North Atlantic and is the only sea in the world with no coastline. Instead of land, it is bounded by four ocean currents that circle clockwise around it: the Gulf Stream on the west, the North Atlantic Current on the north, the Canary Current on the east and the North Atlantic Equatorial Current on the south. Because it sits in the calm centre of this gyre, its water is warm, clear and very salty. It is named after sargassum, a brown seaweed that floats on its surface in huge mats, and it is the breeding ground of the American and European eels. Option A is wrong because the Arctic Ocean lies around the North Pole, far from this sea. Option C is wrong because the Sargasso Sea is north of the equator, not in the South Atlantic. Option D is wrong because the Indian Ocean is on the other side of Africa. Exam tip: Sargasso Sea means North Atlantic, no coastline, walled by currents, named after floating seaweed.

The correct answer is D, Bolivia. A landlocked country has no coastline on an open sea or ocean. South America has only two such countries, Bolivia and Paraguay. Bolivia once had a Pacific coast, but it lost that coastal province to Chile in the War of the Pacific (1879–1884) and has been landlocked ever since. It still keeps a navy, which patrols Lake Titicaca, the lake it shares with Peru and one of the highest navigable lakes in the world. La Paz is the seat of government, while Sucre is the constitutional capital. Option A is wrong because Uruguay lies on the Atlantic coast, and its capital Montevideo stands on the Rio de la Plata estuary. Option B is wrong because Suriname has an Atlantic coastline in the north of the continent, with Paramaribo as its port capital. Option C is wrong because Peru has a long Pacific coast, with Lima and the port of Callao. Exam tip: South America’s two landlocked countries are Bolivia and Paraguay.

The correct answer is A, North Sea. Both rivers flow north-west across the plains of Europe and end in the North Sea. The Rhine rises in the Swiss Alps, forms part of the borders of Switzerland, Germany and France, flows through Germany and enters the sea through the Netherlands, where Rotterdam, Europe's busiest port, stands at its mouth. The Elbe rises in the Czech Republic, flows through Germany past Dresden and reaches the North Sea below Hamburg, another major port. Because of these river ports, the North Sea coast is one of the busiest shipping zones in the world. Option B is wrong because the Mediterranean receives rivers such as the Rhone, the Ebro and the Nile. Option C is wrong because the Adriatic, an arm of the Mediterranean between Italy and the Balkans, receives the Po. Option D is wrong because the Black Sea receives the Danube, the Dnieper and the Dniester. Exam tip: Rhine and Elbe to the North Sea; Danube to the Black Sea; Rhone to the Mediterranean; Po to the Adriatic.

The correct answer is B, Stalagmite. A stalagmite is a column of calcium carbonate that rises from the floor of a limestone cave. Rainwater with dissolved carbon dioxide slowly dissolves limestone and carries it as calcium bicarbonate. When this water drips inside a cave, carbon dioxide escapes and a thin layer of calcium carbonate is left behind, drop after drop, for thousands of years. The drop that hangs from the roof builds a stalactite, and the water that falls on the floor builds a stalagmite below it; when the two meet they form a pillar. Such cave landforms are part of karst topography, seen in India in the Borra Caves of Andhra Pradesh and the caves of Meghalaya. A is wrong because hatectite is not a standard cave term. C is wrong because a stalactite hangs down from the roof, the opposite of what the question describes. D is wrong because dripstone is the general name for all such drip deposits, stalactites and stalagmites alike, not the upward form alone. Exam tip: stalaCtite hangs from the Ceiling, stalaGmite rises from the Ground.

The correct answer is B, Mars and Jupiter. The asteroid belt is a broad band of rocky bodies, from dust-sized grains to bodies hundreds of kilometres across, going round the Sun between the orbit of Mars and that of Jupiter. They are generally taken to be material that never came together into a planet, because the powerful gravity of Jupiter kept disturbing it.

Option A is wrong because nothing of the kind lies between the Earth and Mars. Options C and D place the belt among the outer planets, where the Sun is instead circled by the giant planets and their many moons; far beyond Neptune lies a different zone, the Kuiper belt, which is where Pluto belongs. The asteroid belt is also the boundary used to divide the inner terrestrial planets from the outer giant planets.