geomorphology & earth landforms section 4 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Answer: (b)

Most earthquakes are minor tremors. Larger earthquakes usually begin with slight tremors but rapidly take the form of one or more violent shocks, and end in vibrations of gradually diminishing force called aftershocks.

The subterranean point of origin of an earthquake is called its focus; the point on the surface directly above the focus is the epicentre.

Answer: (d)

Answer: (b)

Hydraulic action is one of the main forms of river erosion (example of erosion due to running water) in which the force of the river against the banks can cause air to be trapped in cracks and crevices.

The pressure weakens the banks and gradually wears it away.

Answer: (a)

When the glaciers melt, the tributary troughs are left as hanging valleys high on the walls of the main glacial valley. 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.

Answer: (a)