24.3

Question 1

earths changing system affected evolution

Answer 1

climate changes
changes in the atmospheres composition
continental drift
changes to the earth as a result of life-forms

Question 2

early atmosphere like

Answer 2

-climate very hot with high levels of CO2
-2 million year cooling period as Co2 was taken out of the atmosphere through the weathering of rocks
-precipitation of calcium carbonate bound up CO2