Name four chief gases present in pre - biotic earth atmosphere?

or:Name four chief gases present in pre - biotic earth atmosphere?or:You need to remember that science is based on observations. \"Pre-biotic\" means

or:Name four chief gases present in pre - biotic earth atmosphere?

or:You need to remember that science is based on observations. \"Pre-biotic\" means there was nobody there to do the observing, so anything you hear is science fiction and only depends on the speaker's story telling skills. As a practical matter, your only option is to read the course materials and compile something that agrees with the teacher's fiction.

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