Question

what things necessary for life are present on the earth?
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Answer 1

Answer:

It is useful to categorize the requirements for life on Earth as four items: energy, carbon, liquid water, and various other elements.

Liquid water: Rare, only on Earth for certain

Chemical energy: e.g., H2 + CO2 → CH4 + H2O

Energy: Common

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Answer 2

Answer:

It is useful to categorize the requirements for life on Earth as four items: energy, carbon, liquid water, and various other elements.