Match each eon or era with the appropriate characteristic or event. 1. Largest mass extinction in Earth's history 2. Toxic atmos

phere; first bacteria 3. Sometimes called "Age of Mammals" 4. Buildup of oxygen; first eukaryotes 5. Current eon 6. Time of the dinosaurs 7. Formation of the solar systema. Archean eonb. Mesozoic erac. Phanerozoic eond. Proterozoic eone.Hadean eonf. Cenozoic erag. Paleozoic era