Question

Help its due next week help

Answer 1

scientists can't be sure about the early atmosphere and can only draw evidence from from other sources.

Step-by-step explanation:

For example volcanoes relase 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 time

how you understand this

Answer 2

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.