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.
What are population pyramids? How do they help in understanding about the population of a country?
Q 2.
Give a brief note on mining.
Q 3.
What are the four Characteristics of resources?
Q 4.
Name the fibre crops and name the climatic conditions required for their growth.
Q 5.
Mention some methods that are used to conserve soil
Q 6.
What is plantation agriculture?
Q 7.
Write a brief note on terrace farming and intercropping.
Q 8.
What are the different characteristics of population composition?
Q 9.
Differentiate between Ubiquitous and localised resources?
Q 10.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 11.
What is sustainable development?
Q 12.
Discuss the role of any two factors influencing population change.
Q 13.
What is mixed cropping or mixed farming?
Q 14.
The world population has grown very rapidly. Why?
Q 15.
What do the 3Rs stand for in context with conservation of natural resources?
Q 16.
What is shifting cultivation? What are its disadvantages?
Q 17.
Name any two steps that government has taken to conserve plants and animals.
Q 18.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 19.
How can one increase agricultural production?
Q 20.
Name any three common minerals used by you every day.
Q 21.
Mention the different types of resources.
Q 22.
How was the word agriculture, coined?
Q 23.
What is the difference between Subsistence farming and Commercial farming?
Q 24.
Give a brief description of soil composition or the layers of soil ?
Q 25.
What is the average density of population in India?
Q 26.
Why are human resources important?
Q 27.
Different crops are grown in different regions.
Q 28.
Distinguish between Metallic and non metallic minerals
Q 29.
Resources have value- discuss ?
Q 30.
What are abiotic resources?
Q 31.
What is a water-cycle?
Q 32.
What are the causes for the destruction of natural vegetation and wildlife?
Q 33.
Why is population growth slowing in united Kingdoms?
Q 34.
Name the factors influencing agriculture?
Q 35.
Write any two reasons for land degradation today?
Q 36.
What is meant by the term industry?
Q 37.
What are the similarities between information technology industries in Bangalore and California?
Q 38.
Write a brief note on wind power ?
Q 39.
Name the 3 sectors of activities done by people.
Q 40.
What are the activities under the secondary sector?
Q 41.
How is farming classified?
Q 42.
What is Nomadic herding?
Q 43.
What are the two main classifications of power resources?
Q 44.
Quarrying can become a major environmental concern.
Q 45.
Write a brief note on Renewable resources ?
Q 46.
What can we do to conserve resources?
Q 47.
How are mineral extracted from earth?
Q 48.
Sixty per cent of the world's people stay in just 10 countries. Name the countries with the percentage of world population.
Q 49.
How does topography affect distribution of population?
Q 50.
Distinguish between the followings.
Primary activities and tertiary activities.
