Where do metals come from?

Where do metals come from?

• A. Ores in the ground are smelted down to separate them from slag until a near-pure metal is reached
• B. Rocks from the ground are melted to form metal
• C. Metals are extracted from seawater
• D. Metals are produced by electroplating

Answer: (A)

Metals come from ore minerals found in the earth. To obtain metal, the ore is heated with a reducing agent in a furnace in a process called smelting. This separates the metal from impurities, producing a liquid metal and a slag of waste materials, and the metal is then refined to higher purity. Other options aren’t correct: melting rocks won’t yield usable metal because they’re mostly silicates with little extractable metal; extracting metals from seawater is technically possible but impractical due to the extremely low concentrations; electroplating is a coating process that adds a layer of metal to a surface rather than producing metal from ore.

Metals come from ore minerals found in the earth. To obtain metal, the ore is heated with a reducing agent in a furnace in a process called smelting. This separates the metal from impurities, producing a liquid metal and a slag of waste materials, and the metal is then refined to higher purity. Other options aren’t correct: melting rocks won’t yield usable metal because they’re mostly silicates with little extractable metal; extracting metals from seawater is technically possible but impractical due to the extremely low concentrations; electroplating is a coating process that adds a layer of metal to a surface rather than producing metal from ore.