Solution of Chapter 7. Landforms and their Evolution (NCERT - Fundamental of Physical Geography Book)

Multiple choice question.

In which of the following stages of landform development, downward cutting is dominated?

Multiple choice question.

A deep valley characterised by steep step-like side slopes is known as

Multiple choice question.

In which one of the following regions the chemical weathering process is more dominant than the mechanical process?

Multiple choice question.

Which one of the following sentences best defines the term ‘Lapies’?

Multiple choice question.

A deep, long and wide trough or basin with very steep concave high walls at its head as well as in sides is known as:

Answer the following questions in about 30 words.

(i) What do incised meanders in rocks and meanders in plains of alluvium indicate?

(ii) Explain the evolution of valley sinks or uvalas.

(iii) Underground flow of water is more common than surface run-off in limestone areas. Why?

(iv) Glacial valleys show up many linear depositional forms. Give their locations and names.

(v) How does wind perform its task in desert areas? Is it the only agent responsible for the erosional features in the deserts?

Answer the following questions in about 150 words.

(i) Running water is by far the most dominating geomorphic agent in shaping the earth’s surface in humid as well as in arid climates. Explain.

(ii) Limestones behave differently in humid and arid climates. Why? What is the dominant and almost exclusive geomorphic process in limestone areas and what are its results?

(iii) How do glaciers accomplish the work of reducing high mountains into low hills and plains?

If landform is a small to medium sized part of the surface of the earth, what is a landscape?

What are the two important aspects of the evolution of landforms?

Most of the geomorphic processes are imperceptible. Cite a few processes which can be seen and a few which can’t be seen.

Is complete reduction of relief of a high land mass possible?

What are the differences between incised meanders and meanders over flood and delta plains?

In what way do natural levees differ from point bars?

What are the basic differences between glacial valleys and river valleys?

Distinguish between river alluvial plains and glacial outwash plains.

What is the difference between till and alluvium?

Do you know about the generating forces behind waves and currents? If not, refer to the chapter on movements in ocean waters.

What are the various differences between a high rocky coast and a low sedimentary coast in terms of processes and landforms?

List the erosional features carved out by wind action and action of sheet floods.