Question:
Name and describe briefly methods of extraction.
Answer:
Mining, drilling and quarrying are methods of extraction. Mining is a process of extraction of taking out minerals from rocks under the earth's surface.
Open cast mining: In this, minerals lying at shallow depths are taken out by removing the surface layer.
Shaft mining: In this, deep bores (called shafts) are made to reach mineral deposits lying at large depths. Drilling: In this, deep wells are bored to take out minerals.
Quarrying: It is the process of extraction in which minerals lying veiy close to the surface are extracted just by digging them out.
Mineral and Power Resources
Q 1.
Write the advantages and dis ¬advantages of non-conventional sources of energy.
Q 3.
Give five ways in which you can save energy at home.
Q 4.
What are the two main classifications of power resources?
Q 6.
Name and describe briefly methods of extraction.
Q 7.
Name two regions rich in natural gas resources.
Q 8.
Why are petroleum and its derivatives called "black gold"?
Q 9.
Distinguish between Ferrous and nonferrous minerals
Q 10.
Give Reason for Environmental aspects must be carefully looked into before building huge dams.
Q 11.
Differentiate between a rock and an ore.
Q 12.
Distinguish between Biogas and natural gas
Q 13.
How are mineral extracted from earth?
Q 14.
Which was the first country to develop hydroelectricity ?
Q 15.
What is natural gas?
Q 17.
Mention a few minerals and their uses.
Q 18.
Distinguish between Metallic and non-metallic minerals
Q 21.
What is an ore? Where are the ores of metallic minerals generally located?
Q 23.
Name some important hydel power stations in India.
Q 24.
Why is coal called "buried sunshine"?
Q 25.
Why are petroleum and its derivatives called "black gold"?
Q 26.
Write a brief note on salt.
Q 27.
Why are minerals considered non-renewable?
Q 28.
Name two areas in Australia, which have large deposits of gold.
Q 29.
Distinguish between Conventional and non conventional sources of energy
Q 30.
Write common uses of minerals.
Q 31.
Name and describe briefly methods of extraction.
Q 32.
Name two minerals in whose production India contributes a significant part.
Q 33.
What are the classifications of minerals?
Q 34.
Pick the Correct Asnwer
(a) Which one of the following is NOT a characteristic of minerals?
(i) They are created by natural processes
(ii) They have a definite chemical composition
(iii) They are inexhaustible
(iv) Their distribution is uneven
(b) Which one of the following is NOT a producer of mica?
(i) Jharkhand (ii) Karnataka (iii) Rajasthan (iv) Andhra Pradesh
(c) Which one of the following is a leading producer of copper in the world?
(i) Bolivia (ii) Ghana (iii) Chile (iv) Zimbabwe
(d) Which one of the following practices will NOT conserve LPG in your kitchen?
(i) Soaking the dal for some time before cooking it
(ii) Cooking food in a pressure cooker
(iii) Keeping the vegetables chopped before lighting the gas for cooking
(iv) Cooking food in an open pan kept on low flame
Q 35.
Name the leading tin producers in Asia.
Q 36.
Name the different rocks that minerals occur in?
Q 37.
In which industry is silicon important? From which ore is it obtained?
Q 38.
Where are minerals found?
Q 39.
Quarrying can become a major environmental concern.
Q 40.
Give reason for Petroleum is referred to as “black gold”.
Q 41.
What is Hydel power?
Q 42.
Name any three common minerals used by you every day.
Q 43.
Give reasons.
(i) Environmental aspects must be carefully looked into before building huge dams.
(ii) Most industries are concentrated around coal mines.
(iii) Petroleum is referred to as "black gold".
(iv) Quarrying can become a major environmental concern.
Q 44.
Name and describe some non- conventional sources of energy.
Q 45.
How is hydroelectricity, produced?
Q 46.
What do the 3Rs stand for in context with conservation of natural resources?
Q 47.
Name nuclear power stations in India.
Q 48.
Give one advantage of biogas over natural gas.
Q 49.
Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid Regions?
Q 50.
Give reason for Most industries are concentrated around coal mines.
