From the initial formation of Earth to the beginning of the Archaean Eon, what c

Question

From the initial formation of Earth to the beginning of the Archaean Eon, what changes or events were happening that prohibited ALL life from existing? In order for prokaryotes to exist continuously on Earth, what geological changes or events had to have occurred first? How did the development of early photosynthetic bacteria impact Earth's early atmosphere? According to the geological evidence, when did this change to Earth's atmosphere caused by the photosynthetic bacteria first appear? Did the biological activity from question 3 and the geological evidence from question 4 happen simultaneously? Or was there a delay between the biological event and the geological result? Explain why you think so. The amount of protective ozone in Earth's atmosphere strongly influences the amount of damaging ultraviolet radiation that reaches Earth's surface. Based on this statement and the information on your Geology and Biology Cards, answer the following questions. Before the increase in atmospheric ozone, what in Earth's environment did early bacterial life use to protect itself from the Sun's damaging UV radiation? Before life could successfully exist on land, what significant change in Earth's atmosphere had to occur? Prior to which time period would oxygen have been poisonous to early life forms on Earth? What type of life forms thrived prior to the time period identified in question 8? How were these life forms able to flourish without oxygen?

Explanation / Answer

Question no.1

Answer

While forming the earth there were a large magma ocean on entire earth, this magma has had very high temperatures. So it does not support any kind of life on earth. In Archaean era magma were cooled and formed crust with unclear topographic features and continents , and most of the earth temperature three higher than today and there was no oxygen in atmosphere, so all these were not support any kind of life on earth in Archaean and initial formation of the earth.

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