Multiple choice

Sun is made up of hot burning gases. The most prominent are ______ and ______.

  1. hydrogen and helium

  2. hydrogen and argon

  3. helium and krypton

  4. nitrogen and helium
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A Correct answer
Explanation

The Sun is primarily composed of hydrogen (about 73% by mass) and helium (about 25% by mass), with trace amounts of heavier elements. These gases undergo nuclear fusion in the Sun's core, producing enormous energy. Note: the Sun 'burns' through nuclear fusion, not chemical burning.

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