geography MCQ #1868

In the composition of Earth, aluminum is:

geography MCQ #1868

  1. Question 1

    Q1. In the composition of Earth, aluminum is:

    • A) 26. 6 per cent
    • B) 23.1 per cent
    • C) 8.1 per cent
    • D) 1.1 per cent

    Answer: 8.1 per cent

    Explanation: Aluminum (Al) constitutes approximately 8.1% of the Earth's crust by mass, making it the most abundant metal and the third most abundant element overall in the crust.