Multiple choice

Which element in the earth' s crust is present in the highest quantity?

  1. Nitrogen

  2. Hydrogen

  3. Oxygen

  4. Carbon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxygen is the most abundant element in the Earth's crust, constituting approximately 46.6% by weight. It's found in silicate minerals, oxides, and water. Silicon is the second most abundant (about 27.7%), followed by aluminum (about 8.1%), and iron (about 5.0%). Carbon, hydrogen, and nitrogen are much less abundant in the crust.

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