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In the term SIMA what does MA represent?

Answer and explanation

Correct answer: Magnesium

The direct answer is B: in SIMA, MA represents magnesium. The term is formed from Si, meaning silica or silicon-related silica content, and Ma, meaning magnesium. In school geography, SIMA is used for the denser, darker layer associated mainly with the oceanic crust, in contrast with SIAL, which refers to silica and aluminium. Option B is correct because the letters MA stand for magnesium. Option A is wrong because manganese is not the meaning of MA in this term. Option C is wrong because methane is a gas and is not part of the abbreviation. Option D is wrong because mercury is a different element and is not represented here. Exam cue: SIMA = Si + Mg; SIAL = Si + Al. Note that this is a simplified textbook classification.

Related tags

SimaMagnesiumOceanic Crust

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