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Minerals and Power Resources
Describe the methods for extracting minerals.
The methods for extracting minerals are described below:
(i)Open cast mining: In this method minerals lying at shallow depths are taken out by removing the surface layer.
(ii)Shaft mining: In it deep bores (called shafts) are made to reach mineral deposits lying at large depths.
(iii)Drilling: Here deep wells are bored to take out minerals.
(iv)Quarrying: It is the process of extraction in which minerals lying very close to the surface are extracted just by digging them out.
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Which one of the following practices will Not conserve LPG in your kitchen.
Give reasons.
Environmental aspects must be carefully looked into before building huge dams.
Give reasons.
Most industries are concentrated around coal mines.
Give reasons.
Petroleum is referred to as 'black gold'.
Give reasons.
Quarrying can become a major environmental concern.
Distinguish between the fallowings.
(i) Conventional and non-conventional sources of energy.
Distinguish between the fallowings.
Biogas and natural gas.
Distinguish between the fallowings.
Ferrous and nonferrous minerals
Distinguish between the fallowings.
Metallic and nonmetallic minerals.
Which of these is a non-metallic mineral?
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