An Example of a Material Which Has Been Both a Resource

question 6

Multiple Choice

An example of a material which has been both a resource and a reserve,depending on abundance,economic conditions,and mining technology is which of the following?

• A) platinum
• B) gold
• C) petroleum
• D) iron
• E) all of these

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Definitions:

Caldera

A large volcanic crater, typically formed by a major eruption leading to the collapse of the mouth of the volcano.

White Snow

A form of precipitation consisting of ice crystals that are soft, white, and cold, typically accumulating on the ground in cold climates.

Ash Column

A towering column of volcanic ash emitted into the atmosphere during explosive volcanic eruptions.

Lava Flows

Streams of molten rock that pour or ooze from an erupting vent, typically flowing at temperatures of 700 to 1,200 degrees Celsius.