What does Hadean mean?
like the underworld (hot and molten)
What does Archea- mean?
What does Protero- mean?
What does Phanero- mean?
What does -zoic mean?
animal or life
How long has life on earth been alive?
What was the change from Hadean to Archeozoic?
Molten earth with only water vapor cooled to land and oceans/seas (3.9 bya)
What was the change from Archeozoic to Proterozoic?
Atmosphere changed from no/low oxygen to an oxygenated atmosphere (2.5 bya)
No fossils from Hadean (molten, any fossils would have melted)
Archeabacteria and cyanobacteria fossils and chemical signatures
Eukaryotic protists evolved