Which scientist would best describe the motion of the earth?
Match each eon or era with the appropriate characteristic or event.

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