- Identify the major eras and periods on the geologic time scale: Precambrian, Paleozoic Era (Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian), Mesozoic Era (Triassic, Jurassic, Cretaceous), and Cenozoic Era.
- Match each event card to its correct era or period based on the first appearance of the organism or event shown.
- Place the cards in chronological order from oldest (left) to most recent (right) within each era.
- Verify placement by cross-referencing known geological timelines: for example, first fish in Cambrian, first land plants in Silurian, first dinosaurs in Triassic, first mammals in Triassic, first birds in Jurassic, first flowering plants in Cretaceous, and Ice Ages in the Cenozoic.
Parent Tip: Review the logic above to help your child master the concept of geologic time scale worksheet.
