TEXTBOOK ANSWERS AND SOLUTIONS OF CBSE CLASS X SOCIAL SCIENCE Chapter 1 Resources and Development

1.Multiple
choice questions
(i)
Which one of the following type of resource is iron ore?
(a)
Renewable
(b)
Biotic
(c)
Flow
(d)
Non-renewable
ANSWER:-
Non-renewable
(ii)
Under which of the following type of resource can tidal energy be put?
(a)
Replenishable
(b)
Human-made
(c)
Abiotic
(d)
Non-recyclable
ANSWER:-
Replenishable
(iii)
Which one of the following is the main cause of land degradation in Punjab?
(a)
Intensive cultivation
(b) Deforestation
(c)
Over irrigation
(d)
Overgrazing
ANSWER:-
Over irrigation
(iv)
In which one of the following states is terrace cultivation practiced?
(a)
Punjab
(b)
Plains of Uttar Pradesh
(c)
Haryana
(d)
Uttarakhand
ANSWER:-Uttarakhand
(v) In
which of the following states is black soil found?
(a)
Jammu and Kashmir
(b)
Gujarat
(c)
Rajasthan
(d)
Jharkhand
ANSWER:-
Gujarat
2.
Answer the following questions in about 30 words.
(i)
Name three states having black soil and the crop which is mainly grown in it.
ANSWER:-Maharashtra,
Madhya

Pradesh and Chhattisgarh are states having black soil. Cotton is mainly grown in black
soil.
ii)
What type of soil is found in the river deltas of the eastern coast? Give three
main features of this type of soil.
ANSWER:-
Alluvial Soil is found in the river deltas of the eastern
coast.
Three
features of alluvial soil:

Alluvial soils are very fertile.

They are ideal for growing
sugarcane,
wheat and paddy.

The regions of alluvial soils
are
intensively cultivated and densely populated.


iii)
What steps can be taken to control soil erosion in the hilly areas?

ANSWER:-In
hilly areas, soil erosion can be controlled by ploughing across contour-lines,
making use of terrace farming
techniques
and using strips of grasses to check soil
erosion by wind and water.
(iv)
What are the biotic and abiotic resources? Give some examples.
ANSWER:-
Biotic
Resources :
The resources which are obtained from the biosphere and have life are
called Biotic Resources. For example, animals and plants including human
beings.
Abiotic
Resources:
The resources which are composed of non-living things are called
Abiotic Resources. For example, water, minerals.
3.
Answer the following questions in about 120 words.
(i)
Explain land use pattern in India and why has the land under forest not
increased much since 1960-61?
ANSWER:-
Land resources in India are primarily divided into
agricultural land, forest land, land meant for pasture and grazing, and waste land. Waste
land includes rocky, arid and desert areas, and land used for other non-agricultural purposes such as housing, roads and industry.
The total geographical area of India is 3.28 million sq km. As per the land use
data only 93% of the total geographical area is available. Of this 43.4% is the
net shown area, forest cover is 22.6%, 4.4% is culturable waste, 7.03% is
current fallow, 4% is covered by pastures and 1% is covered by tree crops.
The land under forest has not increased since 1960–61 because in the post- independence
era demand for more land to expand agriculture,
mainly after Green Revolution, developmental works
and infrastructural facilities, led to clearance of forests areas.
Industrialisation and urbanisation also decreased the forest area. Thus, land
under forest has increased by only about 4% since 1960-61.


(ii)
How have technical and economic development led to more consumption of
resources?
ANSWER:-Technical
and economic development have led to more consumption of resources on account
of various factors.

Such
as:

i)Technological
development

provides sophisticated equipments. As a result, production
increases ultimately leading to consumption of
more resources.
ii)Technological
development

also leads to economic development. When the economic condition of a country rises, the needs
of people also rise. It again results into
more consumption of resources.
iii)
Economic development provides favourable environment for the development of
latest

technologies.