The following are key concepts that you should be familiar with after reading and studying Chapter 18: Geologic Time. To evaluate your understanding of any of the key concepts, select the corresponding Concept Quiz from the Selection Bar and answer the questions provided.
- Geologic time and the “rock record.”
- Putting events in order – Relative dating laws and principles.
- Using principles of relative dating – Interpretation and correlation of rock units.
- Evidence of past life and environments – Fossils.
- Determining ages of events – Radioactive dating.
- The geologic time scale.
