world physical geography section 4 MCQ Questions & Answers Detailed Explanation

Answer: (d)

The Sundarbans Mangroves eco-region on the coast forms the seaward fringe of the delta and is the world's largest mangrove ecosystem, with 20,400 square kilometres of the area covered.

The dominant mangrove species Heritiera fomes is locally known as sundri or sundari.

Answer: (d)

• Blizzard – Siberian Plains. A blizzard is a severe snowstorm caused by strong sustained winds of at least 56 km/h (35 mph) and lasting for a prolonged period of time – typically three hours or more.
• Chinook – Prairie Plains. Chinook winds blow in the interior west of North America, where the Canadian Prairies and Great Plains meet various mountain ranges, although the original usage is in reference to wet, warm coastal winds in the Pacific Northwest of the United States of America.
• Bora – Green land. Cold and usually dry katabatic winds, like the Bora, result from the downslope gravity flow of cold, dense air. Katabatic flows slumping down from uplands or mountains may be funnelled and strengthened by the landscape and are then known as mountain gap wind.
• Khamsin – Egypt. Khamsin can be triggered by depressions that move eastwards along the southern parts of the Mediterranean or along the North African coast from February to June. In Egypt, khamsin usually arrives in April but occasionally occurs between March to May, carrying great quantities of sand and dust from the deserts, with a speed up to 140 kilometres per hour, and a rise of temperatures as much as 20°C in two hours.

Answer: (a)

Temperate grasslands, include the Prairie and Pacific Grasslands of North America, the Pampas of Argentina, Brazil and Uruguay, calcareous downland, and the steppes of Europe. The Pampas of South America are a grassland biome.

Answer: (c)

The characteristic of the Tropical Savannah Region is a definite dry and wet season.

Answer: (a)

Five-flower lake is situated in Jiuzhaigou valley of China.

Answer: (c)