everyday science MCQ #316

The second most abundant element found in the Earth's crust is:

everyday science MCQ #316

  1. Question 1

    Q1. The second most abundant element found in the Earth's crust is:

    • A) Sodium
    • B) Aluminum
    • C) Calcium
    • D) Silicon

    Answer: Silicon

    Explanation: Silicon is the second most abundant element in Earth's crust at about 28% by mass, after oxygen (~46%), existing mainly as silicon dioxide (SiO₂) and silicate minerals.