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s2008m [1.1K]
2 years ago
3

How is modern Earth different from Earth over four billion years ago?

Biology
1 answer:
Alborosie2 years ago
3 0

Modern earth has more protective atmosphere.

  • The growth of Earth's atmosphere over geologic time, or atmospheric evolution. Although the method by which the present atmosphere evolved from past conditions is complex, there is a wealth of indirect evidence for this evolution. The atmospheric composition has changed in the past as a result of chemical reactions with the Earth's crust and, in particular, with biological processes related to life, according to ancient sediments and rocks.
  • The initial atmosphere of Earth was deficient in free oxygen but abundant in methane, ammonia, water vapor, and the noble gas neon. The first biological generation of oxygen by unicellular organisms and its eventual accumulation in the atmosphere most likely occurred hundreds of millions of years apart.

Therefore, option D. is correct.

Learn more about earth atmosphere:

brainly.com/question/21605112

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Please find the difference between correlation and causation in the explanation section

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Correlation and causation are two mistaken terms during data analysis and conclusion, however, these two terms mean different things.

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