Multiple choice

Which of the following was the source of energy, in early days when atmosphere had more hydrogen, ammonia and methane while less of oxygen?

  1. Solar radiation

  2. Volcanic heat

  3. Lightning

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar radiation,Volcanic heat , Lightning was the source of energy, in early days when atmosphere had more hydrogen, ammonia and methane while less of oxygen.

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