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How do we know the age of the Universe and the Earth?

How do we know the age of the Universe and the Earth?

Another ask an astronomer site. See attached assignment for specifics.
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Debbie Mixon
Debbie Mixon (Faculty)
10 years ago
Although this assignment is beyond my current grade level there is enough material to warrant adapting the lesson for my first grade class.

Technical Remarks:

There were no difficulties in navigating this site or the links it provides.
Dr. Troy Tenhet
Dr. Troy Tenhet (Faculty)
11 years ago
Very information-rich website that enables students to ask an astronomer questions. There are useful links as well. A good site for 7th graders.