We are going to learn some of the history of Earth. One of the ways that we will do this is to construct as a class a timeline of Earth's history, beginning with the formation of our Solar System, marked by the time our Sun began to fuse hydrogen into helium in its core, about 4.6 billion years ago. Our timeline will be 11 m in length, so all 4.6 billion years will have to fit along this line. The first mark on the timeline will be the formation of Earth itself. As we found out today, that appears to be 4.5 billion years ago. We will outline some of the arguments that lead to these ages now and in Chapter 21, 'Stars, Galaxies, and the Universe.'
Assignments:
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Earth ScienceMr. Swackhamer Archives
March 2020
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