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Earth's Changes Through Time: Geologic Time

Main Topics | Standards | Science Probe | Lessons | Resources

Main Topics & Concepts
Introduction to the Geologic Time Scale.
Introduction to the history of the Earth.

Standards
SFUSD Content Standard 17.2 - Researching a variety of dating methods, using radioactive materials and index fossils to construct a timeline of major events in earthÆs history.

SFUSD Content Standard 17.10 - Describing how fossil deposits and rock formations help date when changes have occurred on Earth.

Science Probe Text
As part of the chapter on Geological Time, Science Probe II Chapter 12.5 provides a simple paragraph about the geologic time scale. No activities related to the timescale are provided.

Activities & Lessons
Activity Access Description
Time's Arrow: Understanding Geologic Time

Museum of Paleontology

paper Coming Soon! This on-line module introduces students to the idea of relative and absolute time, and how the geologic time scale is put together.
What Came First

Museum of Paleontology

paper Students gain an understanding of deep time and become familiar with events in the Earth's history by arranging a series of events on a large time scale.

Resources
Resources Access Description
Geology Wing

Museum of Paleontology

web Exploring this on-line exhibit will take you on a journey through the history of the Earth, where you can learn about the fossil record, stratigraphy, and plate tectonics during particular time periods.
History of the Geologic Time Scale

Museum of Paleontology

web Learn how the Geologic Time Scale was constructed and how it is organized. Good site for teacher background and student reading.
The Geologic Time Scale

Museum of Paleontology

web Detailed Geologic Time Scale produced by the Geological Society of America.
Geologic Time

USGS

web This on-line general interest publication gives information the age of the Earth and introduces the concepts of absolute and relative time. It describes the geologic time scale and various methods for dating rocks and fossils.
Rather text-intensive, with pictures and charts.
Fossils, Rocks, and Time

USGS

web This on-line general interest publication provides an overview of relative and absolute time, and the geologic time scale. It goes into more detail on fossils and rocks than the publication on Geologic Time.