CBSE Class 8 Social Science
Question 23 of 29
Mineral and Power Resources — Question 23
Back to all questions 23
Question Name and describe briefly methods of extraction.
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.
Opencast 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 very close to the surface are extracted just by digging them out.