Students view geologic time lines and discuss how old the Earth and solar system is, when dinosaurs roamed Earth, and when humans first appeared. They review the four major eons and life that was present in each before creating a time...

Learners investigate the history of Earth by creating a geologic time scale.  In this Earth History lesson plan, students practice sequencing events in their life as a way to get familiar with creating a time scale.  Learners...

Students examine the various populations that have made their home in the Tijuana Estuary. In groups, they read an article and note the name of each population, facts and what tools they used in a journal. They use colored notecards to...