About This Chapter
How it works:
- Identify the lessons in Prentice Hall Earth Science Geologic Time chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the geologic time topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, re-watch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Theories of geological evolution
- Methods of geological dating
- Relative dating
- Conditions of fossil preservation
- Principles of radiometric dating
- Geologic time scale
Prentice Hall Earth Science is a registered trademark of Prentice Hall Inc., which is not affiliated with Study.com.
1. Theories of Geological Evolution: Catastrophism vs Uniformitarianism
Geologists haven't always agreed about the history of our planet. They have debated between catastrophism and uniformitarianism over the last few hundred years! Learn about the two main theories of geologic evolution and how scientists came to resolve the dispute.
2. Methods of Geological Dating: Numerical and Relative Dating
Learn how scientists determine the ages of rocks and fossils. We'll explore both relative and numerical dating on our quest to understand the process of geological dating. Along the way, we'll learn how stratigraphic succession and radioactive decay contribute to the work of paleontologists.
3. What is Relative Dating? - Law of Superposition, Principles of Original Horizontality & Cross-Cutting Relationships
Discover how geologists study the layers in sedimentary rock to establish relative age. Learn how inclusions and unconformities can tell us stories about the geologic past. We'll even visit the Grand Canyon to solve the mystery of the Great Unconformity!
4. Conditions of Fossil Preservation: Rapid Burial, Hard Parts & the Elements
Learn how fossils are formed and how varying conditions affect the preservation of organisms. What is the best way for a dinosaur to become fossilized? Find out here!
5. Relative Dating with Fossils: Index Fossils as Indicators of Time
You may already know how to date a fossil with a rock. But did you know that we can also date a rock with a fossil? Watch this video to find out how we use index fossils to establish the relative ages of rocks.
6. Principles of Radiometric Dating
Radiometric dating is a method used to determine the age of rocks and other materials based on the rate of radioactive decay. Learn about three common types of radioactive decay: alpha decay, beta decay and gamma decay.
7. Radiometric Dating: Methods, Uses & the Significance of Half-Life
Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes. Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson.
8. Geologic Time Scale: Major Eons, Eras, Periods and Epochs
The geologic time scale is an essential tool for understanding the history of Earth and the evolution of life. In this lesson, explore the principal eons, eras, periods, and epochs that help us track major events in geologic history.
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Other chapters within the Prentice Hall Earth Science: Online Textbook Help course
- Prentice Hall Earth Science Chapter 1: Introduction to Earth Science
- Prentice Hall Earth Science Chapter 2: Minerals
- Prentice Hall Earth Science Chapter 3: Rocks
- Prentice Hall Earth Science Chapter 4: Earth's Resources
- Prentice Hall Earth Science Chapter 5: Weathering, Soil, and Mass Movements
- Prentice Hall Earth Science Chapter 6: Running Water and Groundwater
- Prentice Hall Earth Science Chapter 7: Glaciers, Deserts, and Wind
- Prentice Hall Earth Science Chapter 8: Earthquakes and Earth's Interior
- Prentice Hall Earth Science Chapter 9: Plate Tectonics
- Prentice Hall Earth Science Chapter 10: Volcanoes and Other Igneous Activity
- Prentice Hall Earth Science Chapter 11: Mountain Building
- Prentice Hall Earth Science Chapter 13: Earth's History
- Prentice Hall Earth Science Chapter 14: The Ocean Floor
- Prentice Hall Earth Science Chapter 15: Ocean Water and Ocean Life
- Prentice Hall Earth Science Chapter 16: The Dynamic Ocean
- Prentice Hall Earth Science Chapter 17: The Atmosphere: Structure and Temperature
- Prentice Hall Earth Science Chapter 18: Moisture, Clouds, and Precipitation
- Prentice Hall Earth Science Chapter 19: Air Pressure and Wind
- Prentice Hall Earth Science Chapter 20: Weather Patterns and Severe Storms
- Prentice Hall Earth Science Chapter 21: Climate
- Prentice Hall Earth Science Chapter 22: Origin of Modern Astronomy
- Prentice Hall Earth Science Chapter 23: Touring Our Solar System
- Prentice Hall Earth Science Chapter 24: Studying the Sun
- Prentice Hall Earth Science Chapter 25: Beyond Our Solar System