Science exam (part 7)
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Created by:
moliver5 Plus on December 13, 2011
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11 terms
Terms | Definitions |
|---|---|
 What does Hadean mean? | like the underworld (hot and molten) |
| What does Archea- mean? | ancient |
| What does Protero- mean? | simple/original |
| What does Phanero- mean? | visible |
| What does -zoic mean? | animal or life |
| How long has life on earth been alive? | 4.6 bya |
| 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) |
| Hadean fossils... | No fossils from Hadean (molten, any fossils would have melted) |
| Archeozoic fossils... | Archeabacteria and cyanobacteria fossils and chemical signatures |
| Proterozoic fossils... | Eukaryotic protists evolved |
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