About This Chapter
Who's it for?
Anyone who needs help learning or mastering AP environmental science material will benefit from taking this course. There is no faster or easier way to learn AP environmental science. Among those who would benefit are:
- Students who have fallen behind in understanding theories of geological evolution or working with the geologic time scale
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about geologic time
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Geologic Time chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the Geologic Time chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any geologic time question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in a geologic time unit of a standard AP Environmental Science course. Topics covered include:
- Geologic time scale
- Theories of geological evolution
- Methods of geological dating, including numerical and relative
- Principles of radiometric dating
- Conditions of fossil preservation and relative dating with fossils
1. 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.
2. 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.
3. 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.
4. 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!
5. 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.
6. 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.
7. 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!
8. 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.
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Other chapters within the AP Environmental Science: Help and Review course
- Introduction to AP Environmental Science: Help and Review
- AP Environmental Science - Plate Tectonics: Help and Review
- AP Environmental Science - Earthquakes: Help and Review
- AP Environmental Science - Volcanoes: Help and Review
- AP Science - The Atmosphere & Environment: Help & Review
- AP Environmental Science - Weather and Storms: Help and Review
- AP Environmental Science - Water Balance: Help and Review
- AP Environmental Science - Running Water: Help and Review
- AP Environmental Science - Ground Water: Help and Review
- AP Environmental Science - Glaciers: Help and Review
- AP Environmental Science - Oceans: Help and Review
- AP Science Help & Review: Water Issues & Water Conservation
- AP Environmental Science - Minerals, Rocks & Soil: Help and Review
- AP Environmental Science - Ecosystems: Help and Review
- AP Science - Interaction Among Organisms: Help & Review
- AP Environmental Science - Evolving Ecosystems: Help and Review
- AP Environmental Science - Biological Science: Help and Review
- AP Science - Population and the Environment: Help & Review
- AP Environmental Science Agricultural Resources: Help & Review
- AP Science - Rangelands & Forestry: Help & Review
- AP Environmental Science - Mining & Fishing: Help and Review
- AP Environmental Science - Energy Concepts: Help and Review
- AP Environmental Science - Renewable Resources: Help and Review
- AP Environmental Science - Nonrenewable Resources: Help and Review
- AP Environmental Science - Solid and Hazardous Waste: Help and Review
- AP Science - Humans & the Environment: Help & Review
- Environmental Sustainability: Help & Review for AP Science
- Environmental Risk Analysis: Help & Review for AP Science
- AP Science - Environmental Economics: Help & Review
- AP Environmental Science Help & Review: Ethics & Politics