Geography · Geomorphology
Consider the following elements found in the Earth's crust: 1. Oxygen2. Silicon3. Aluminum4. Iron5. Calcium Which of the following is the correct descending order of their abundance by weight in the Earth's crust?
- 1Silicon > Oxygen > Aluminum > Iron > Calcium
- 2Oxygen > Iron > Silicon > Aluminum > Calcium
- 3Oxygen > Silicon > Iron > Aluminum > Calcium
- 4Oxygen > Silicon > Aluminum > Iron > Calcium✓
Correct answer
Oxygen > Silicon > Aluminum > Iron > Calcium
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