Geologic Timeline Reflection

1. The three major events in Earth's history is the extinction of dinosaurs, cyanobacteria, and the evolution of land plants. The evolution of land plants changed Earth's landscape and created more habitats for animals to live in. The extinction of dinosaurs marked the end of the cretaceous and began the paleogene period. Cyanobacteria created photosynthesis, which led to the creation of oxygen and the reduction of carbon dioxide.
2. It includes many geological time periods that helped form the Earth today. The thing that surprised me was the amount of time periods there were that helped form Earth. I had never knew that there were several time period. I only knew a few of them and now I know there are lots of time periods that occured before the modern day.
3.  We have impacted Earth in a short time by natural resources producing in Earth. It includes the formation of rocks, rivers, landscapes and more where organisms can live well there.