Mena

The video tutorial discusses metalliferous ores, which contain metals like iron, copper, and aluminum, often combined with oxygen. It explains that the term 'Mena' is used when the concentration of a useful substance in an ore is high enough to make its extraction economically viable.

What are metalliferous ores primarily composed of?

• Non-metallic minerals

• Metals like iron, copper, and aluminum

• Gases

• Organic compounds

Which of the following metals is commonly found in metalliferous ores?

• Gold

• Iron

• Silver

• Platinum

What does the term 'Mena' refer to in the context of ores?

• A measure of ore purity

• A type of metal

• A method of extraction

• A term for high concentration of useful substances

When is the extraction of a useful substance from ore considered economically viable?

• When the concentration of the substance is high

• When the extraction process is simple

• When the ore is rare

• When the ore is found in large quantities

What factor determines the economic viability of extracting metals from ores?

• The age of the ore

• The concentration of the useful substance

• The location of the ore

• The color of the ore