Question:
Write a brief note on salt.
Answer:
Salt is a dietary mineral essential for animal life. It is composed primarily of sodium chloride. Salt is produced in different forms they are unrefined salt or sea salt, refined salt or table salt and iodized salt.
Salt is a crystalline solid, white, pale pink or light grey in color. It is obtained by evaporation of sea water, usually in shallow basins warmed by sunlight.
It is also obtained from rock deposits.
Salt is used in more than 14,000 commercial applications other than in cooking. It is used in the manufacture of pulp and paper and setting dyes in
textiles and fabric. It is also used in producing soaps and detergents and for making snow-covered roads safe in winter. Salt plays an essential role in our daily lives.
Resources
Q 1.
Which are the two main climatic factors responsible for soil formation?
Q 2.
What are population pyramids? How do they help in understanding about the population of a country?
Q 3.
What is Nomadic herding?
Q 4.
Which industry is often referred to as the backbone of modem industry and why?
Q 5.
What is meant by the term industry?
Q 6.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 7.
Distinguish between Biogas and natural gas
Q 8.
Write a brief note on Intensive subsistence farming.
Q 9.
What is mixed cropping or mixed farming?
Q 10.
What is plantation agriculture?
Q 12.
Give a brief note on mining.
Q 13.
What are the two main classifications of power resources?
Q 15.
Name the 3 sectors of activities done by people.
Q 16.
Why are human resources important?
Q 17.
What is shifting cultivation? What are its disadvantages?
Q 18.
Different crops are grown in different regions.
Q 19.
Name any three common minerals used by you every day.
Q 20.
Name the different rocks that minerals occur in?
Q 21.
Give a brief description of soil composition or the layers of soil ?
Q 22.
Why are resources distributed unequally over the earth?
Q 23.
Name the fibre crops and name the climatic conditions required for their growth.
Q 24.
What is meant by population composition?
Q 25.
Ganga-Brahmaputra plain of India is an overpopulated region.
Q 26.
Distinguish between the followings
(i) Agro-based and mineral based industry.
Q 27.
Give Reason for Environmental aspects must be carefully looked into before building huge dams.
Q 28.
Mention the different types of resources.
Q 29.
What are the different kinds of cultivation?
Q 30.
How are mineral extracted from earth?
Q 31.
What do the 3Rs stand for in context with conservation of natural resources?
Q 32.
What are the methods that can be adapted to contain landslides?
Q 33.
What are the causes for the destruction of natural vegetation and wildlife?
Q 34.
Write any two reasons for land degradation today?
Q 35.
Why cotton textile industry rapidly expanded in Mumbai?
Q 36.
Distinguish between Ferrous and nonferrous minerals
Q 37.
Write a brief note on wind power ?
Q 38.
What are abiotic resources?
Q 39.
What can we do to conserve resources?
Q 40.
How can one increase agricultural production?
Q 41.
Write a brief note on terrace farming and intercropping.
Q 42.
Write a brief note on the Ministry of Human Resource Development in India.
Q 43.
Differentiate between emigrants and immigrants.
Q 44.
Why is population growth slowing in united Kingdoms?
Q 45.
What is sustainable development?
Q 46.
Differentiate between Ubiquitous and localised resources?
Q 47.
In India agriculture is a primary activity.
Q 48.
The world population has grown very rapidly. Why?
Q 49.
Name any two steps that government has taken to conserve plants and animals.
Q 50.
Suggest three ways to conserve water.
