Earths History

Over about the last week we have been studying earth history and we have learned many things some of the things we learned about included that the Earth was formed about 4.6 billion years ago. In the Precambrian era, the first life formed. Single celled cyanobacteria was developed. After that the Paleozoic era, life continued to develop. More complicated organisms were formed and fish and reptiles evolved. The Mesozoic era was basically the age of Dinosaurs. In the Cenozoic era, most of the species we see today were formed. Continues to the present. Many species went extinct over the years. These include the Ordovician, the Devonian, the Permian, the Triassic, and the Cretaceous extinctions.

We made a to scale timeline in class of the earth’s history. which included multiple events that happen over earth's history. the only difficulty we had was figuring out the right measurements to make the timeline “to scale”