Question 1

Question 3Below are given names of a few lakes of India. Group them under two categories natural and created by human beings.WularDalNainitalBhimtalGobind SagarLoktakBarapaniChilikaSambharRana Pratap SagarNizam SagarPulicatNagarjuna SagarHirakund

Accepted Answer

Natural LakesArtificial lakesWularGobind SagarDalRana Pratap SagarNainitalNizam SagarBhimtalBarapaniPulicatNagarjuna SagarLoktakHirakundChilikaSambhar

Question 2

Question 4Discuss the significant difference between the Himalayan and the Peninsular rivers.

Accepted Answer

Himalayan RiversPeninsular RiversThese rivers are perennial.These rivers are seasonal.They receive water from melting snow as well as rains.They receive water from rains.They are long with larger drainage basins.They are relatively shorter and shallower with smaller drainage basins.They perform intensive erosional activity and bring huge load of silt and sand.They are less erosive.Major rivers are the Indus, the Ganga and the Brahmaputra.Major rivers are the Godavari, the Krishna and the Mahanadi.

Question 3

Question 5Compare the east flowing and the west flowing rivers of the Peninsular plateau.

Accepted Answer

Differences between east flowing and west flowing rivers of the Peninsular plateau:East flowing riversWest flowing riversThey flow eastwards and drain into Bay of Bengal.They flow westwards and drain into Arabian sea.They make deltas at their mouth.They make estuaries.They are longer.They are shorter.Example: Mahanadi, Godavari, KrishnaExample: Narmada, Tapi, Sabarmati

Question 4

Question 6Why are rivers important for the country’s economy?

Accepted Answer

Rivers are important for the country's economy in following way:Rivers are a vital source of freshwater for drinking, irrigation, industrial and household use.Fertile floodplains and delta regions of rivers are often highly productive agricultural areas.Rivers are used as inland waterways providing cost-effective transport for bulk goods, such as grains, minerals, industrial products etc.Multipurpose river valley projects are developed on rivers which provide hydroelectricity, flood control, water supply etc.Rivers provide tourism and recreation opportunities.Rivers provide water for industrial use.Rivers are used for fresh water fishery.

Question 5

Question 2(v)Why does the Brahmaputra in its Tibetan part have less silt, despite a longer course?

Accepted Answer

The Brahmaputra in its Tibetan part have less silt, despite a longer course because it has smaller volume of water and the area is cold and dry.

Question 6

Question 2(vi)Which two Peninsular rivers flow through trough?

Accepted Answer

Two Peninsular rivers that flow through trough are Narmada and Tapi.

Question 7

Question 2(vii)State some economic benefits of rivers and lakes.

Accepted Answer

Some economic benefits of rivers and lakes include:Water supply for agriculture, industry, and households.Navigation and transport.Hydro-power generation.Fisheries supporting the fishing industry.Tourism and recreation opportunities.

Drainage

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