Students investigate radioactivity as a tool for measuring geologic time and how geologists use this information to determine the absolute age of rocks or minerals.

In this geologic time scale worksheet, students are given a list of terms and eras which they use to complete a time scale. They classify organic and inorganic changes that took place in the Precambrian era, the Cenozoic era, the...

For this geological time worksheet, student use a geologic time scale to understand the difference between eons, eras, and periods. Then learners complete 2 short answer questions.

Students model the geologic timescale using distance as a metaphor for time. They write a summary of a major event or fossil organism. and station themselves and their summaries along a path within a gymnasium, and present their...

High schoolers explore the development of the geologic time scale. They examine the major time periods in earth's history. Students discuss the role fossils play in helping us understand history.