geomorphology & earth landforms section 9 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Answer: (b)

Earthquakes are important in landform studies because they can trigger off catastrophic events in erosion processes.

These include large-scale landslides and mudflows, as in Peru in 1970. A number of spectacular glacier surges have been observed in Alaska, and some are thought to be associated with earthquakes.

Answer: (b)

Answer: (b)

A hanging valley is a tributary valley with the floor at a higher relief than the main channel into which it flows. They are most commonly associated with U-shaped valleys when a tributary glacier flows into a glacier of larger volume.

The main glacier erodes a deep U-shaped valley with nearly vertical sides while the tributary glacier, with a smaller volume of ice, makes a shallower U-shaped valley. Since the surfaces of the glaciers were originally at the same elevation, the shallower valley appears to be ‘hanging’ above the main valley

Answer: (d)

Answer: (c)

Anthracite is usually considered to be the highest grade of coal and is actually considered to be metamorphic.

Compared to other coals it is much harder, has a glassy lustre, and is denser and blacker with few impurities. It is largely used for heating domestically as it burns with little smoke.