geomorphology & earth landforms section 8 MCQ Questions & Answers Detailed Explanation

Answer: (c)

Arkose is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar.

It is commonly coarse-grained and usually either pink or grey (depending on the colour of feldspar).

Answer: (d)

Answer: (a)

The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometres). But, if we measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km).

Thus, the earth is a tad wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).

Answer: (b)

The Deccan Traps are a large igneous province located on the Deccan Plateau of west-central India (between 17°–24°N, 73°–74°E) and one of the largest volcanic features on Earth.

They consist of multiple layers of solidified flood basalt that together are more than 2,000 m (6,562 ft) thick and cover an area of $500000 km^2$ (193,051 sq mi) and a volume of $512000 km^3$ (123,000 cu mi).

The term “trap”, used in geology for such rock formations, is derived from the Swedish word for stairs and refers to the steplike hills forming the landscape of the region.

Answer: (d)

Answer: (c)

The prospect of producing electricity from the hydrological resources of the Plateau region lies not, as has been suggested, in the ‘region’s fast-flowing rivers'. The flow rate of most rivers in the region is relatively slow.

However, the sloped topography of the plateau itself provides enormous capacity to generate electricity. All existing and planned hydropower projects in the region are based on the simple engineering principle of utilizing gravity to generate energy from the region’s rivers. The steep escarpments found in the south-eastern portion of the region provide the natural topographical mechanism to subject the region’s water resources to the energy-producing force of gravity.