The Cosmic Calendar
Erika Grundstrom, Vanderbilt University
In this activity, one takes ALL of time, from the beginning of time (i.e., the Big Bang) all the way up to today, but one compresses it into one year. One can do this for all levels of students depending on how ...

Crater Counting Lab exercise
Kevin Mullins, Coconino County Community College
This lab is designed to teach students how we can estimate the age of other planetary surfaces by counting and size-binning impact craters. It also illustrates some examples of how erosional or deopositional ...