The sun is made up of 99.9% of ________________ and ______________?
Correct answer: D. Hydrogen and Helium
- A. Oxygen and Hydrogen
- B. Hydrogen and Sulfur
- C. Carbon and Silicon
- D. Hydrogen and Helium
Explanation
Hydrogen and helium together account for about 99.9% of the Sun’s mass, with hydrogen making up the larger share. The heavier elements are present only in small amounts.
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