geomorphology & earth landforms section 7 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Answer: (d)

1. Slate- Metamorphous Rock

2. Lignite- sedimentary Rock

3. Bauxite- Non ferrous mineral

4. Granite - Igneous Rock

Answer: (d)

A valley that has been formed by glacial erosion has characteristic U-shaped with a wide, flat floor and very steep sides. In glacial erosion, the main valley is eroded much more rapidly than the tributary valley as it contains a much larger glacier.

After the ice has melted a tributary valley, therefore, ‘hangs’ above the main valley so that its stream plunges down as waterfall. Such tributary valleys are called a hanging valley.

Answer: (c)

Answer: (a)

Metamorphic rocks are rocks that have “morphed” into another kind of rock. These rocks were once igneous or sedimentary rocks.

How do sedimentary and igneous rocks change? The rocks are under tons and tons of pressure, which fosters heat build-up, and this causes them to change. If you exam metamorphic rock samples closely, you’ll discover how flattened some of the grains in the rock are.

Answer: (b)

The Himalayas, lying in Indian territory, is spread over a length of about 2,500 km and a width of 220 to 300 km.

It covers partially/fully twelve states/provinces of India viz., Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam and West Bengal.