Science Activity
Texte du Storyboard
- Scientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes.
- It is believed that there was an intense volcanic activity for the first billion years of the Earth's existence. The early atmosphere was probably mostly carbon dioxide, with little or no oxygen.
- There were smaller proportions of water vapor, ammonia, and methane. As the Earth cooled down, most of the water vapor condensed and formed the oceans. Scientists can’t be sure about the early atmosphere and can only draw evidence from other sources.
- For example, volcanoes release high quantities of carbon dioxide. Iron-based compounds are present in very old rocks that could only have formed if there was little or no oxygen at the time.
- WORTHy
- The atmosphere is the layer of gases that surrounds the Earth. It provides gases that are essential to life. It has evolved over time and human activity is having an impact on the atmosphere.
- Internet
- Hope you learned a lot!Bye!
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