Textbook Solutions: Relief Features of the Continents | Footprints Class 6: Book Solutions, Notes & Worksheets PDF Download

I. Tick (✔) the correct option. 

1.
Ans: (b)
Older mountains, known as old fold mountains, were formed 200-300 million years ago.

2.
Ans: (c)
The Alps are located in Europe.

3.
Ans: (b)
The Himalayas are formed as a result of folding, making them an example of fold mountains.

4.
Ans: (c)
Mt Fujiyama in Japan is an example of a volcanic mountain formed by the eruption of magma.

5.
Ans: (c)
Glaciers on mountains melt to form rivers (statement a) and that mountains act as physical barriers (statement b).

6.
Ans: (b)
The part of the lithospheric plates uplifted by push or pull movements is known as a block mountain or horst.

7.
Ans: (b)
Plateaus are sometimes called flat-topped mountains or tablelands.

8.
Ans: (c)
The Tibetan Plateau as the highest plateau in the world.

9.
Ans: (b)
Plains are described as flat and low-lying areas.

10.
Ans: (c)
The Indo-Gangetic Plain in India, the Northern Plain in China, and the Siberian Plain in Russia are among the largest plains.

II. State whether the following statements are true or false. Rewrite the statements to correct them. 

1.
Ans: True.

2.
Ans: False.
Plateaus are raised much higher than the surrounding area.

3.
Ans: True.

4.
Ans: False.
Some plateaus are surrounded by mountains.

5.
Ans: False.
Mt Pelée in the Caribbean Islands as an example of a volcanic mountain.

III. Answer the following questions in brief. 

1.
Ans: The three main processes are folding, faulting, and volcanic eruptions.

2.
Ans: In folding, upward folds or ridges are known as anticlines, and downward folds or valleys are called synclines.

3.
Ans: A rift valley is formed when the land between faults sinks down due to tectonic plate movements.

4.
Ans: Plateaus are significant as they are often rich in minerals, fertile soil, and provide a flat area for various activities.

5.
Ans: Plains are fertile because rivers and their tributaries carry and deposit materials like silt, clay, and sand, forming alluvium.

IV. Answer the following questions in detail. 

1.
Ans: Young fold mountains, formed within the last 40 million years, tend to be high and rugged, examples include the Alps and Himalayas. Old fold mountains, formed 200-300 million years ago, are less rugged, examples include the Appalachians and Aravallis.

2.
Ans: Faulting is the result of tectonic plate movements causing the fracturing of the Earth's lithospheric plates. Examples of landforms formed by faulting include block mountains (e.g., Harz Mountains) and rift valleys.

3.
Ans: Volcanic mountains are formed when hot molten rock (magma) erupts through openings in the Earth's crust, cools, and builds up layers of rock and lava. Examples include Mt Fujiyama, Mt Vesuvius, and Mt Pelee.

4.
Ans: Plateaus are flat areas raised higher than the surrounding land, while mountains are raised steeply with peaks. Plateaus can be formed by geological forces like tectonic or volcanic action, and erosion, whereas mountains are formed by folding, faulting, or volcanic eruptions.

5.
Ans: Plains are densely populated because they provide fertile agricultural land, the best living conditions, and are often formed by river deposits, resulting in abundant resources for human settlements.