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.
Which are the two main climatic factors responsible for soil formation?
Q 3.
Which industry is often referred to as the backbone of modem industry and why?
Q 4.
What is mixed cropping or mixed farming?
Q 5.
What is meant by the term industry?
Q 6.
Write a brief note on Intensive subsistence farming.
Q 7.
What is Nomadic herding?
Q 8.
Name any three common minerals used by you every day.
Q 9.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 10.
Distinguish between Biogas and natural gas
Q 12.
Name any two steps that government has taken to conserve plants and animals.
Q 13.
What are the two main classifications of power resources?
Q 14.
Write any two reasons for land degradation today?
Q 15.
Distinguish between Ferrous and nonferrous minerals
Q 16.
What are abiotic resources?
Q 17.
Name the 3 sectors of activities done by people.
Q 18.
How can one increase agricultural production?
Q 19.
Give a brief description of soil composition or the layers of soil ?
Q 20.
Name the fibre crops and name the climatic conditions required for their growth.
Q 21.
Different crops are grown in different regions.
Q 22.
Why people are considered a resource?
Q 23.
The world population has grown very rapidly. Why?
Q 24.
Distinguish between the followings
(i) Agro-based and mineral based industry.
Q 25.
Quarrying can become a major environmental concern.
Q 26.
Mention the different types of resources.
Q 27.
Resources have value- discuss ?
Q 28.
Write a brief note on wind power ?
Q 29.
What are the activities under the secondary sector?
Q 30.
How are mineral extracted from earth?
Q 31.
Write a brief note on terrace farming and intercropping.
Q 32.
Write a brief note on the Ministry of Human Resource Development in India.
Q 33.
What is agriculture?
Q 34.
What is plantation agriculture?
Q 35.
In India agriculture is a primary activity.
Q 36.
Distinguish between the followings.
Primary activities and tertiary activities.
Q 37.
Rows of trees planted in the coastal areas to check the wind movement is called intercropping ?
Q 38.
Give five ways in which you can save energy at home.
Q 39.
Distinguish between Conventional and non conventional sources of energy
Q 40.
What can we do to conserve resources?
Q 41.
How was the word agriculture, coined?
Q 42.
What is the difference between Subsistence farming and Commercial farming?
Q 43.
Give a brief note on mining.
Q 44.
What do the 3Rs stand for in context with conservation of natural resources?
Q 46.
How does land fulfil our needs?
Q 47.
What are the causes for the destruction of natural vegetation and wildlife?
Q 48.
What is population study known as?
Q 49.
Why is population study essential?
Q 50.
What is population density?
