Middle School Resource The Age of Earth This video, from History.com’s archive, focuses on scientist’s efforts to discover how old the Earth is. Related NY State Academic Standards: S.MS.LS.4.1, S.MS.ESS.2.1, MST4 and more! Be sure to check out our Educational Resources, featuring thousands of activities, lesson plans, constructed-response questions, rubrics, teacher resources, multimedia, and more! […]