Large quantities of near-surface ores, like coal, gold, and copper, are mined with ________.

1) Underground mining
2) Open-pit mining
3) Placer mining
4) Subsurface mining

Question

20-01-2025
Geography

High School

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Large quantities of near-surface ores, like coal, gold, and copper, are mined with ________.

1) Underground mining
2) Open-pit mining
3) Placer mining
4) Subsurface mining

Answer :

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Final answer:

Large quantities of near-surface ores like coal, gold, and copper can be mined using surface mining techniques such as open-pit mining, strip mining, placer mining, and dredging. Ores that are deeper require subsurface mining methods, which involve blasting and tunneling into the rock to access the ore.

Explanation:

Surface Mining: Large quantities of near-surface ores, like coal, gold, and copper are mined with surface mining techniques. Surface mining includes various methods such as open-pit mining, strip mining, placer mining, and dredging. Open-pit mining involves digging a large hole to extract the ore body, while strip mining removes material along a strip of land. Placer mining involves extracting minerals from sediments in rivers or streams, and dredging involves removing sediments from bodies of water.

Subsurface Mining: Subsurface mining is used for ores that are deeper into the Earth's surface. This method involves blasting and tunneling into the rock to access the ore. It is more expensive and dangerous than surface mining, but it is necessary for ores located at significant depths.

Large quantities of near-surface ores, like coal, gold, and copper, are mined with ________.1) Underground mining 2) Open-pit mining 3) Placer mining 4) Subsurface mining

Answer :

Final answer:

Explanation:

Other Questions

Large quantities of near-surface ores, like coal, gold, and copper, are mined with ________.

1) Underground mining
2) Open-pit mining
3) Placer mining
4) Subsurface mining