About This Chapter
Who's it for?
This unit of our High School Biology Homeschool course will benefit any student who is trying to learn about various aspects of geologic time. There is no faster or easier way to learn about biology. Among those who would benefit are:
- Students who require an efficient, self-paced course of study to learn about the Law of Superposition and the principles of radiometric dating.
- Homeschool parents looking to spend less time preparing lessons and more time teaching.
- Homeschool parents who need a biology 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 unit exam confirm understanding or identify any topics that require review.
Geologic Time Unit Objectives:
- Study the major eras, periods and eons of the geologic time scale.
- Explore the significance and methods of radiometric dating.
- Explain the common types of radioactive decay.
- Compare catastrophism and uniformitarianism.
- Learn about the significance of half life.
- Discover how numerical dates are used by geologists who study the Earth's history.
- Explain how index fossils are used to indicate time.
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 High School Biology: Homeschool Curriculum course
- Science Vocabulary & Basics: Homeschool Currilum
- Science Lab Skills: Homeschool Curriculum
- Inorganic Chemistry Review: Homeschool Curriculum
- Organic Chemistry Introduction: Homeschool Curriculum
- Functions & Reactions of Enzymes: Homeschool Curriculum
- Cell Biology: Homeschool Curriculum
- Requirements of Biological Systems: Homeschool Curriculum
- Cell Communication: Homeschool Curriculum
- Metabolic Biochemistry: Homeschool Curriculum
- Cell Division: Homeschool Curriculum
- Nucleic Acids: Homeschool Curriculum
- DNA Replication: Homeschool Curriculum
- Transcription & Translation: Homeschool Curriculum
- Principles of Heredity: Homeschool Curriculum
- Genetic Mutations: Homeschool Curriculum
- DNA Technology & Genomics: Homeschool Curriculum
- Bacterial Biology: Homeschool Curriculum
- Introduction to Viruses: Homeschool Curriculum
- The Origin of the Universe: Homeschool Curriculum
- Evolution Overview: Homeschool Curriculum
- The Classification of Organisms: Homeschool Curriculum
- Plant Biology: Homeschool Curriculum
- Plant Reproduction & Growth: Homeschool Curriculum
- Introduction to Fungi: Homeschool Curriculum
- Introduction to Invertebrates: Homeschool Curriculum
- Introduction to Vertebrates: Homeschool Curriculum
- The Circulatory & Respiratory Systems: Homeschool Curriculum
- The Immune & Endocrine Systems: Homeschool Curriculum
- Animal Reproduction & Development: Homeschool Curriculum
- Human Reproductive Systems: Homeschool Curriculum
- Ecology & the Environment: Homeschool Curriculum
- The Environmental Impact of Humans: Homeschool Curriculum
- Animal Behavior: Homeschool Curriculum
- Molecular Biology Lab Techniques: Homeschool Curriculum
- Analyzing Scientific Data: Homeschool Curriculum