Quiz #10
暂无描述。系统推荐的高质量记忆内容,适合每天坚持背诵学习。
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Order the eras oldest to most recent
Precambrian, Paleozoic, Mesozoic, Cenozoic
Precambrian
Longest and first era when organisms (bacteria) first appear
Paleozoic
2nd era, Age of Invertebrates, Pangea forms
Mesozoic
3rd era, Pangea breaks apart, Age of Reptiles, dinosaurs dominate, first small mammals
Cenozoic
4th era, continents in modern places, Age of Mammals, Ice Age
Geologic time scale
Record of the events of the life forms and geologic events in Earth’s history
How is the geologic time scale divided and why?
Into eras based on major changes in life forms
What are eras divided into?
Periods
What is one large gap in major time line events of Earth?
Formation of Earth and 1st organisms bc the amount of oxygen wasn’t enough at first