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Geologic Time on the Web
Students examine a geologic time line on the Internet. They preview questions they are looking for before visiting the "Understanding Geologic Time" website. They browse through the site to find their answers and complete their worksheet.
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Worksheet: How Do We Know How Old Earth Is?
A short reading passage about types of evidence used to estimate Earth's age is provided before giving junior geologists a research assignment. They define petrology, stratigraphy, and paleoontology. They describe the job of a geologist...
6th - 9th Science