Curated OER
Evolution worksheet
Looking at evolution in detail, this thorough instructional activity has complex questions requiring details and explanations of natural selection and diversity. Various examples of biological characteristics are available, and students...
Curated OER
Dating Sedimentary Strata
Students investigate how the age of sedimentary strata is determined. In this sedimentary strata lesson, students work through problems that show that geological history covers millions of years. They distinguish between relative and...