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Before the presence of living organisms, Earth was a very different place. Match each fact about Precambrian Earth to the sphere most affected by it.

1. Cyanobacteria began to emerge as a life-form.
2. Oceans contained far less salt than they do today.
3. Oxygen spilled into this sphere from ocean waters.
4. Oxidation in rocks and minerals was not possible.

A. Atmosphere
B. Biosphere
C. Hydrosphere
D. Lithosphere



Answer :

GinnyAnswer

Final answer:

The Precambrian Earth underwent major changes in various spheres like the biosphere, atmosphere, and hydrosphere.


Explanation:

The Precambrian Earth experienced significant changes relating to different spheres:

  • Biosphere: Cyanobacteria emerged as a life-form and started the oxygenation process of the atmosphere.
  • Atmosphere: Oxygen spilled into this sphere from ocean waters.
  • Hydrosphere: The oceans contained far less salt than they do today, and oxidation in rocks and minerals was not possible.

Learn more about Precambrian Earth and Spheres here:

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