Atmósfera
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Atmósfera

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Atmósfera Atmósfera Presentation Transcript

  • hidrógeno océanosnitrógeno Vapor de agua amonia Atmósfera primitiva Dióxido de carbono Vapor de agua El origen de la atmósfera condensación Presente Hidrosfera autótrofos Atmósfera actual: - nitrógeno - oxígeno FOTOSÍNTESIS oxígeno Roca caliza metano Dióxido de carbono Hace 4,600 millones de años