This is the concept of --or the Law of Superposition.Stratigraphic sequences in the field, however, are sometimes unreliable.Discuss that the changes that have occurred on Earth including the terrain, temperature, landforms and organisms make it difficult to predict where dinosaurs may be found.Ask: How has the GPS technology helped scientists to locate evidence of changing life forms?Following the activity, ask the students: What can scientists learn from studying dinosaur bones?
To facilitate the activity, the teacher will provide some introduction to absolute dating principles through the Half Life of M&M Worksheet.
All of the artifacts in a given stratum will be of approximately the same age, while those in strata above or below will be younger or older respectively.
Cross-dating can indirectly establish a date for artifacts and sites.
Concept 3, PO 5: Distinguish between relative and absolute geologic dating techniques.
This activity has students working as archaeologists.