Geological Time Line

Our class spent a week and a half doing a project regarding the prehistoric eras of the Earth. We started with the Cambrian period, ending with the Tertiary. We were split into groups and had to research one of these periods. I chose the Cretaceous period which took place about 40-165 million years ago. I learned that when the dinosaurs were becoming extinct, warm-blooded mammals began to take over. They appeared mostly at night time and avoided larger animals because of their size. There are two types of mammals that are still alive today. The Marsupial mammals who developed in the adults pouch because of their immaturity at birth. The Placental Mammals were more advanced when they were younger, and could fend for themselves better. These mammals became more dominant on earth then the Marsupial Mammals did. I worked well with my partner and we evenly split the work load. From the other groups I gained a lot of information that I had never knew before. I enjoyed presenting and hearing about the other groups information. I also liked walking around and viewing the different fossils each group constructed. I feel as through I learn information better with hands on activities like this one. Making a poster helps me lay out all the facts and organize my ideas neatly.