Question:
Give a brief note on mining.
Answer:
The process of taking out minerals from rocks buried under the earths surface is called mining. Mining can be classified into Open-cast mining and shaft mining.
Open-cast mining, refers to a method of extracting rock or minerals from the earth by their removal from an open pit or borrow. Open-pit mines are used when deposits of commercially useful minerals or rock are found near the surface.
Shaft mining refers to the method of sinking a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom. The shafts have to be made to reach mineral deposits that lie at great depths.
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.
Write a brief note on terrace farming and intercropping.
Q 6.
Mention some methods that are used to conserve soil
Q 7.
What is plantation agriculture?
Q 8.
Differentiate between Ubiquitous and localised resources?
Q 9.
The world population has grown very rapidly. Why?
Q 10.
Discuss the role of any two factors influencing population change.
Q 11.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 12.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 13.
Mention the different types of resources.
Q 14.
Name any two steps that government has taken to conserve plants and animals.
Q 15.
What is meant by the term industry?
Q 16.
What is mixed cropping or mixed farming?
Q 17.
What are the different characteristics of population composition?
Q 18.
Name any three common minerals used by you every day.
Q 19.
How can one increase agricultural production?
Q 20.
What is a water-cycle?
Q 21.
What is sustainable development?
Q 22.
What is shifting cultivation? What are its disadvantages?
Q 23.
Distinguish between Metallic and non metallic minerals
Q 24.
What are the causes for the destruction of natural vegetation and wildlife?
Q 25.
Different crops are grown in different regions.
Q 26.
Write any two reasons for land degradation today?
Q 27.
What are the activities under the secondary sector?
Q 28.
How was the word agriculture, coined?
Q 29.
What do the 3Rs stand for in context with conservation of natural resources?
Q 30.
Why are human resources important?
Q 31.
Name the factors influencing agriculture?
Q 32.
What are the similarities between information technology industries in Bangalore and California?
Q 33.
What is the difference between Subsistence farming and Commercial farming?
Q 34.
Complete the sentences below using some of the following words, sparsely, favourable, fallow, artificial, fertile, natural, extreme, densely
Q 35.
Suggest three ways to conserve water.
Q 36.
Which are the main factors which influence the location of an industry?
Q 37.
Distinguish between Conventional and non conventional sources of energy
Q 38.
Resources have value- discuss ?
Q 39.
What are abiotic resources?
Q 40.
How is farming classified?
Q 41.
What is Nomadic herding?
Q 42.
What are the classifications of minerals?
Q 44.
Give a brief description of soil composition or the layers of soil ?
Q 45.
Sixty per cent of the world's people stay in just 10 countries. Name the countries with the percentage of world population.
Q 46.
What is the average density of population in India?
Q 47.
Why is population growth slowing in united Kingdoms?
Q 48.
Why people are considered a resource?
Q 49.
Distinguish between the followings
(i) Agro-based and mineral based industry.
Q 50.
Quarrying can become a major environmental concern.
