Curated OER
Dating Sedimentary Strata
Students investigate how the age of sedimentary strata is determined. In this sedimentary strata lesson plan, students work through problems that show that geological history covers millions of years. They distinguish between relative...
Curated OER
A Scale of the Earth
Students create a scale model of the different eras, periods, and epochs of Earth's 4.6 billion year history. In addition to different time periods, other major events will also be added to the model from fabricated radioactive decay...
Khan Academy
Khan Academy: The Atmosphere and Life
This is an interview between two scientists discussing how shaping the biosphere is due to geologic events and changes in the atmosphere. Learn how there is a "complex balance between Earth's processes and its network of life".