Q1. Hanging valleys are associated with
(a) Winds action
(b) Glacial action
(c) Wave action
(d) River action
Q2. In terms of area, India is the ………. largest country of the world.
Q3. India exports iron ore mainly to
Q4. Sea breeze is formed during
(a) Day time
(b) Night time
Q5. The ‘Pacific Ring of Fire’ is associated with
(a) Oil well fires
(b) Thermal power station
(c) Volcanoes and earthquakes
(d) Forest fires
Q6. Dolomite is a/an
(a) Sedimentary rock
(b) Plutonic rock
(c) Igneous rock
(d) Metamorphic rock
Q7. Taiga means :
(a) Decidious forests
(b) Coniferous forests
(c) Grass lands
Q8. Natural sources of air pollution are
(a) Smoke from vehicles
(b) Volcanic eruptions
(c) Dust storm
(d) Smoke from burning dry leaves
Q9. Which one of the following is the largest river in the world?
Q10. The Civilian Airport of highest altitude is in
Sol. A hanging valley can be formed when the lower valley has a greater rate of erosion. This can be cause by 2 glacier flows, one feeding the other
Sol. India is the seventh largest country on the basis of land area of 32,87,263 sq.km.
Sol. India is the fifth largest exporter of iron ore in the world. We export about 50 to 60 per cent of our total iron ore production to countries like Japan, Korea, European countries and lately to Gulf countries. Japan is the biggest buyer of Indian iron ore accounting for about three-fourths of our total exports.
Sol. During the day, the land surface heats up faster than the water surface. The air above the land is warmer than the air above the ocean. As the warm air over the land is rising, the cooler air over the ocean is flowing over the land surface to replace the rising warm air. This is the sea breeze.
Sol. The Ring of Fire is a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur. It is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements.
Sol. Dolomite, also known as “dolostone” and “dolomite rock,” is a sedimentary rock composed primarily of the mineral dolomite, CaMg(CO3)2. Dolomite is found in sedimentary basins worldwide.
Sol. Taiga also known as boreal forest or snow forest is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches.
Sol. One of the most important natural causes of air pollution is volcanic eruption. Volcanic eruptions can generate so much polluting gases and ash into the air that the sun’s rays could be blocked, and land temperature in the affected area lowered. The ash can cause respiratory problems for young children, the elderly or those already with respiratory ailments.
Sol. Amazon is the first largest river and second longest river in the world.
Sol. Daocheng Yading Airport (China), which opened in September 2013, is the highest-altitude airport in the world. It is located at an elevation of 4,411m.
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