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Geological Time & Earth's History: Unlocking 4.6 Billion Years of Our Planet
Learners will explore how scientists use the geologic time scale, fossils, and radiometric dating to piece together the remarkable 4.6-billion-year story of Earth.
What You'll Learn
Earth is approximately 4.6 billion years old according to scientific evidence.
The geologic time scale divides history into eons, eras, periods, and epochs.
Relative and absolute dating methods help scientists determine rock layer ages.
Index fossils and superposition are key tools for reading Earth's record.
What You'll Practice
1
Students practice calculating rock ages using radioactive decay and half-life.
2
Questions test knowledge of geologic time scale divisions and major eras.
3
Learners identify index fossils, unconformities, and relative dating principles.
Why This Matters
Understanding geological time equips students to interpret Earth's 4.6-billion-year history, connecting rock layers, fossils, and dating methods to real-world science and future learning in geology, biology, and environmental studies.
This Unit Includes
Practice exercises
Learning resources
Skills
Geological Time
Radiometric Dating
Fossil Record
Superposition
Mass Extinction
FL Curriculum Aligned