Answered

  1. Hadean eon          formation of the solar system
  2. Archean eon         buildup of oxygen; first eukaryotes
  3. Proterozoic           eon largest mass extinction in Earth's history
  4. Phanerozoic         eon time of the dinosaurs
  5. Paleozoic era       sometimes called "Age of Mammals"
  6. Mesozoic era       current eon in Earth's history
  7. Cenozoic era        toxic atmosphere; first bacteria

Verified Answer :

jayjay112

 1.Hadean eonsometimes called Age of Mammals                                2.Archean eontoxic atmosphere; first bacteria                                                3.Proterozoic eonbuildup of oxygen first eukaryotes                            4.Phanerozoic eoncurrent eon                                                                        5.Paleozoic eratime of the dinosaurs                                                                  6.Mesozoic eralargest mass extinction in Earth's history                            7.Cenozoic eraformation of the solar system

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