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    Question

    The most abundant element in the EarthтАЩs crust is:

    A Silicon Correct Answer Incorrect Answer
    B Aluminum Correct Answer Incorrect Answer
    C Iron Correct Answer Incorrect Answer
    D Oxygen Correct Answer Incorrect Answer
    E Calcium Correct Answer Incorrect Answer

    Solution

    Oxygen constitutes ~46.6% of the crust by weight, followed by silicon (27.72%).

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