Consider the following minerals found in the Earth's crust:

1. Oxygen

2. Silicon

3. Aluminum

4. Iron

5. Calcium

Which of the following is the correct descending order of their abundance in the Earth's crust?

The correct answer is option 1

Key Points

• Oxygen is the most abundant element in the Earth's crust, making up about 46% by weight.
• Silicon is the second most abundant, constituting about 28% by weight.
• Aluminum follows at around 8%, making it the most common metal in the crust.
• Iron is present at about 5%, contributing to many igneous and metamorphic rocks.
• Calcium, essential in carbonate rocks like limestone, makes up about 4%.

Additional Information

• Key Differences