Which of the following statements related to the stages of evolution of the present atmosphere are correct? 1. The first stage is marked by the loss of primordial atmosphere 2. In the second stage, the hot interior of the earth contributed to the evolution of the atmosphere 3. Finally, the composition of the atmosphere was modified by the living world through the process of photosynthesis Select the answer using the code given below:
1, 2 and 3
The present atmosphere evolved in stages: the primordial atmosphere (mainly hydrogen and helium) was lost due to the sun's heat and solar winds, after which volcanic outgassing from the hot interior of the early Earth released gases such as water vapour and carbon dioxide to form a secondary atmosphere. Later, photosynthetic life released oxygen and modified the atmosphere's composition into its present form, so all three statements are correct.
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