Extraction Of Ores Flashcards
What is the primary purpose of ore extraction?
To obtain valuable minerals and metals from the earth.
True or False: The process of extracting ores is also known as mining.
True
Fill in the blank: The two main types of mining are ________ and ________ mining.
surface, underground
What is surface mining?
A method of mining that involves removing soil and rock above a mineral deposit.
What are some common methods used in underground mining?
Room and pillar, cut and fill, and longwall mining.
Multiple Choice: Which of the following is NOT a method of ore extraction? A) Open-pit mining B) Shaft mining C) Hydroponics D) Placer mining
C) Hydroponics
Define ‘placer mining’.
A method of extracting valuable minerals from alluvial deposits by washing or dredging.
What is the role of beneficiation in ore extraction?
To increase the concentration of valuable minerals and reduce waste.
True or False: Smelting is a process that occurs after ore extraction.
True
What is the main environmental concern associated with mining?
Land degradation and pollution of water sources.
Fill in the blank: The economic viability of an ore deposit is determined by its ________ and ________.
grade, market price
What is meant by ‘ore grade’?
The concentration of a particular mineral within an ore.
Multiple Choice: Which mineral is commonly extracted using open-pit mining? A) Coal B) Gold C) Iron ore D) All of the above
D) All of the above
What is the purpose of drilling in the mining process?
To explore and assess the mineral content and structure of the deposit.
True or False: All ores are mined using the same techniques.
False
