QUIZ 1. What was the first geological period on earth called? a. Cenozoic b. Hadean c. Paleozoic d. Phanerozoic Answer: b. The Hadean period is the first period known on earth. This was followed by several other periods. 2. During which geologic eon did mankind and mammals first occur on earth? a. Paleozoic b. Archean c. Cenozoic d. Mesozoic Answer: c. The Cenozoic eon was the latest eon. It was when mammals and mankind was first developed and happened after the dinosaurs died out. 3. When did the first prokaryotes first emerge on earth? a. Archean era b. Phanerozoic era c. Cenozoic era d. Hadean era Answer: a. The Archean era or eon is when the first prokaryotic forms of life developed on earth. This was shortly after earth s crust was solidified and when earth was no longer molten.
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