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    Question

    The тАЬsialтАЭ layer of the crust is rich in:

    A Silica and Magnesium Correct Answer Incorrect Answer
    B Silica and Aluminum Correct Answer Incorrect Answer
    C Iron and Nickel Correct Answer Incorrect Answer
    D Calcium and Sodium Correct Answer Incorrect Answer
    E Oxygen and Hydrogen Correct Answer Incorrect Answer

    Solution

    Sial (Si + Al) refers to the upper crust, while sima (Si + Mg) is the lower layer. ┬а

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