The Geological Time Scale - (9/11 - 9/17)

Image Source: https://goo.gl/G6icTZ

Summary: 

     The Geological Time Scale is a calendar for all the major events that happened on earth. The time scale has eons, which are the biggest unit of time. Eons are incredibly long- so far there are only two in the Earth's life of 4.5 billion years. The first eon is the Pre-Cambrian eon, which was the eon before life on earth and was the setup for the Phanerozoic Eon, which is the eon in which life begun. We are still currently in the Phanerozoic Eon. Eons on the geological time scale are then split into eras. The Pre-Cambrian Eon is split into the Hadean, Archean and Proterozoic Era. The Phanerozoic Eon is split into the Paleozoic, Mesozoic and Cenozoic eras. The Paleozoic era was the beginning of life on earth, especially for aquatic life. The Mesozoic era was the era of the dinosaurs, and the Cenozoic era saw the rise in mammals being the dominant species.

SP6 - Constructing Explanations: 

     This week I constructed explanations through the work of my research of the Geological Time Scale. Currently, I am studying the Paleozoic Era. So far, I have found out that the Paleozoic Era was the beginning of life on earth and was a step forward in evolution, especially for aquatic life and plants. Arthropods who are the ancestors of spiders and Trilobites are some prime examples. The super-continent of Gondwana also formed during that era. As I found more and more information about the Paleozoic Era, I constructed explanations about the major events in that era through my notes and shared a bit of information with my team.