Answer
The four primordial processes that led to the formation of the atmosphere as we know it today, which allowed life to form on Earth, are:
a. Outgassing: Volcanic activity released gases from Earth's interior, including water vapor, carbon dioxide, methane, and ammonia, into the early atmosphere.
b. Primordial atmosphere: The early atmosphere was composed of water vapor, carbon dioxide, nitrogen, and smaller amounts of other gases, shaped by the outgassing process.
c. Condensation of water vapor: As the Earth's surface cooled, water vapor in the atmosphere condensed to form the first oceans, shaping the hydrosphere.
d. Photosynthesis: The evolution of photosynthesizing bacteria and later cyanobacteria allowed for the accumulation of oxygen in the atmosphere through the process of photosynthesis.
Work Step by Step
Refer to the above answer.
