world physical geography section 7 MCQ Questions & Answers Detailed Explanation

Answer: (a)

1. Faults – Earth movements (A fault is formed in the Earth’s crust as a brittle response to stress. Generally, the movement of the tectonic plates provides the stress, and rocks at the surface break in response to this.)
2. Flood Plains – Fluvial effect (Flood plains are made by a meander eroding sideways as it travels downstream. When a river breaks its banks and floods, it leaves behind layers of alluvium (silt). This gradual build-up creates the floor of the flood plain.
3. Coral reefs – Organic activity (Coral reefs begin to form when free-swimming coral larvae attach to submerged rocks or other hard surfaces along the edges of islands or continents. As the corals grow and expand, reefs take on one of three major characteristic structures —fringing, barrier or atoll.)
4. Moraines – Glacial Activity (A moraine are formed along the sides of a glacier. As the glacier scrapes along, it tears off rock and soil from both sides of its path. This material is deposited as lateral moraine at the top of the glacier’s edges.

Answer: (b)

Bass Strait is a sea strait separating Tasmania from the south of the Australian mainland, specifically the state of Victoria. Its maximum width is 240 km, its depth is 50–70 m.

Answer: (d)

Answer: (b)

1. Podzols are subarctic soils of the cold, humid northern coniferous forest (taiga), found between the mixed forests of the temperate zone and the tundras of the arctic zone.
2. Chernozem is a black-coloured soil containing a high percentage of humus (7% to 15%), and high percentages of phosphoric acids, phosphorus and ammonia. Chernozem is very fertile and produces a high agricultural yield. Chernozem soils are found in humus-rich grasslands such as in Prairies, Pampa and Steppes.
3. Spodsols soils develop under coniferous vegetation.
4. Laterite. soils are found in hot and humid areas.

Answer: (c)

Mr X will likely to be flown over Black Sea. Since Black Sea is bounded by Europe, Anatolia and Caucasus, it is ultimately connected to the Atlantic Ocean.

Answer: (a)

• The North Atlantic Current (NAC), also known as North Atlantic Drift and North Atlantic Sea Movement, is a powerful warm western boundary current that extends the Gulf Stream north-eastward.
• The NAC originates from where the Gulf Stream turns north at the Southeast Newfoundland Rise, a submarine ridge that stretches southeast from the Grand Banks. The NAC flows northward east of the Grand Banks, from 40°N to 51°N, before turning sharply east to cross the Atlantic.
• It transports more warm tropical water to northern latitudes than any other boundary current; more than 40 Sv in the south and 20 Sv as it cross the Mid-Atlantic Ridge.