Mining Methods and Mineral Extraction

Dr. Rahul Murray introduces the topic of mineral extraction for class 8 geography. He explains the concepts of extraction and mining, and details four methods of mineral extraction: quarrying, open cast mining, shaft mining, and drilling. Each method is described with examples and illustrations. The lesson concludes with a preview of the next topic.

What is the process of taking something out from the earth called?

• Extraction

• Excavation

• Erosion

• Evaporation

Which method is used when minerals are located near the earth's surface?

• Shaft Mining

• Quarrying

• Drilling

• Open Cast Mining

What is the main characteristic of minerals extracted through quarrying?

• Need long narrow holes

• Require deep wells

• Found near the surface

• Located at great depths

What is another name for Open Cast Mining?

• Open Pit

• Strip Mining

• Deep Mining

• Surface Mining

Which method involves removing the surface layer to access minerals?

• Open Cast Mining

• Shaft Mining

• Drilling

• Quarrying

What is a shaft in the context of mining?

• A long narrow hole

• A drilling machine

• A wide tunnel

• A surface pit

Which method involves creating a long narrow hole to reach minerals?

• Drilling

• Shaft Mining

• Open Cast Mining

• Quarrying

Which method is most suitable for extracting minerals at great depths?

• Drilling

• Shaft Mining

• Open Cast Mining

• Quarrying

What is the primary use of the drilling method?

• Extracting minerals from the surface

• Extracting oil and natural gas

• Extracting minerals from shallow depths

• Extracting coal

What is the best example of drilling in everyday life?

• Quarrying

• Borewell

• Open Pit

• Shaft