About This Chapter
Who's it for?
Anyone who needs help learning or mastering high school biology material will benefit from taking this course. There is no faster or easier way to learn biology. Among those who would benefit are:
- Students who have fallen behind in understanding earth's evolution or geological time, dating and fossils
- 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 geological time, dating and fossils
- 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, dating and fossils 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, dating and fossils chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any geological time, dating or fossil 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 geological time, dating and fossils unit of a standard high school biology course. Topics covered include:
- Catastrophism and uniformitarianism
- Relative dating
- Radiometric dating
- Fossil preservation
- Index 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.
9. Fossil Record: Definition & Examples
This lesson teaches you about the fossil record. It explains how scientists learn about Earth's distant past and highlights what fossils can tell scientists about ourselves and other organisms.
10. Trace Fossil: Definition, Examples & Importance
Trace fossils, unlike their rockstar counterpart body fossils, are often underappreciated. In this lesson, find out what trace fossils are, how they are different from body fossils, and why they are important to understanding the ancient world.
11. What is Strontium? - Facts, Uses & Side Effects
In this lesson, we will learn about strontium. We will explore the current and past commercial uses of strontium as well as how our body uses and reacts to this element.
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- The Origin of the Universe and Life on Earth: Help and Review
- Evolution Basics: Help and Review
- The Evolution & Classification of Organisms: Help and Review
- Basics of Plant Biology: Help and Review
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- Introduction to Fungi: Help and Review
- Introduction to Invertebrates: Help and Review
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- Circulatory System & Other Systems: Help & Review
- The Nervous, Immune, and Endocrine Systems: Help and Review
- Animal Reproduction & Embryonic Development: Help and Review
- Human Reproductive Systems: Help and Review
- Ecology and the Environment: Help and Review
- Human Effects on the Environment: Help and Review
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- Laboratory Techniques for Molecular Biology & Genetic Engineering: Help and Review
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