About This Chapter
Who's it for?
This unit of our AP Environmental Science Homeschool course will benefit any student who is trying to learn about the geologic time scale's epochs and periods. There is no faster or easier way to learn about environmental science. Among those who would benefit are:
- Students who require an efficient, self-paced course of study to learn about geological dating methods, such as relative and numerical dating.
- Homeschool parents looking to spend less time preparing lessons and more time teaching.
- Homeschool parents who need an environmental science curriculum that appeals to multiple learning types (visual or auditory).
- Gifted students and students with learning differences.
How it works:
- Students watch a short, fun video lesson that covers a specific unit topic.
- Students and parents can refer to the video transcripts to reinforce learning.
- Short quizzes and a geologic time scale unit exam confirm understanding or identify any topics that require review.
Geologic Time Scale Unit Objectives:
- Discover theories of geological evolution.
- Learn about radiometric dating principles.
- Explore fossil preservation conditions.
- Compare uniformitarianism and catastrophism.
- Learn about the law of superposition and relative dating.
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: Homeschool Curriculum course
- Environmental Science Introduction: Homeschool Curriculum
- Plate Tectonics: Homeschool Curriculum
- Earthquakes: Homeschool Curriculum
- Volcanoes: Homeschool Curriculum
- The Atmosphere and the Environment: Homeschool Curriculum
- Weather and Storms: Homeschool Curriculum
- Water Balance: Homeschool Curriculum
- Running Water: Homeschool Curriculum
- Ground Water: Homeschool Curriculum
- Glaciers: Homeschool Curriculum
- Oceans: Homeschool Curriculum
- Water Issues & Conservation: Homeschool Curriculum
- Minerals, Rocks & Soil: Homeschool Curriculum
- Ecosystems: Homeschool Curriculum
- Organism Interaction in the Ecosystem: Homeschool Curriculum
- Evolving Ecosystems: Homeschool Curriculum
- Biological Science: Homeschool Curriculum
- Population and the Environment: Homeschool Curriculum
- Food and Agricultural Resources: Homeschool Curriculum
- Forestry, Rangelands & Other Land Use: Homeschool Curriculum
- Mining & Fishing: Homeschool Curriculum
- Energy Concepts: Homeschool Curriculum
- Renewable Resources: Homeschool Curriculum
- Nonrenewable Resources: Homeschool Curriculum
- Solid and Hazardous Waste: Homeschool Curriculum
- Human Impact on the Environment: Homeschool Curriculum
- Environmental Sustainability: Homeschool Curriculum
- Global Environmental Economics: Homeschool Curriculum
- Environmental Ethics & Politics: Homeschool Curriculum