Unit Objectives
After you have completed this unit, you will be able to:
- Describe relative and absolute dating and how they differ from each other.
- Describe how materials on Earth are assigned relative and absolute dates.
- Explain how stratigraphy and radiometric dating can be used to date Earth materials.
- Describe the development of the geologic time scale and construct a geologic time scale.
- Describe how life on Earth has changed over time.
