Early Atmosphere and Oceans

Early Atmosphere And Oceans

Earth’s atmosphere and oceans have changed significantly since the planet formed about 4.6 billion years ago. In its early history, Earth had a thick atmosphere composed primarily of carbon dioxide, methane, and water vapor, but it lacked oxygen. The first oceans formed as volcanic eruptions rel...

In its earliest days, our Earth was a molten ball with no atmosphere and no oceans. The surface was so hot that water and gases couldn't exist as we know them.

Over time, gases began escaping from volcanic eruptions. Additionally, Comets crashing into Earth brought icy materials that, when warmed, turned into gases and water vapor.

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