Q4 of 12 Page 39

Identify and name the landforms in the following diagrams :

Figure 1 : It is V-Shaped Valley because Landform produced due to erosional work of rivers. A V-shaped river valley is formed near the origin of the river or in its upper course. Vertical erosion occurs rapidly near the river. Comparatively the headward erosion is lesser. And therefore its elevation is higher. But the riverbed starts deepening. Consequently, it gets the shape of the alphabet ‘V’;


Figure 2: It is Stalactite and Stalagmite because Pillars formed from alkaline deposits in the caves in limestone areas. The Salts brought by flowing groundwater deposit in the caves when water evaporates.


Figure 3: Since because the glaciers carry sediments with them and hence they are called as moraines


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2

Correct and rewrite the incorrect statements :

A. The ice on the lateral side of the glacier moves faster than the ice at the base.


B. The depositional work by river shappens because of gentle slope, reduced speed and transported sediments.


C. A river flows at a faster speed than the glacier.


D. The speed of the glacier is more on both the banks than in the middle.

 3

Identify the wrong pair

A. Deposition - V–shaped valley


B. Transport - Ripple Marks


C. Erosion - Mushroom Rocks

 5

Complete the following table by classifying the landforms according to their agents of erosion.(waterfall, delta, cirque, arête, barchans, moraine, pothole, mushroom rock,sinkholes, beach, pillars, lagoons)

 6

Answer the following questions in brief.

List the landforms that are a result of the erosional work of the rivers.