About This Chapter
How it works:
- Identify which concepts are covered on your geologic time homework.
- Find videos on those topics within this chapter.
- Watch fun videos, pausing and reviewing as needed.
- Complete sample problems and get instant feedback.
- Finish your geologic time homework with ease!
Topics from your homework you'll be able to complete:
- Geologic time scale
- Theories of geological evolution
- Methods of geological dating
- Relative dating
- Principles of radiometric dating
- The significance of half-life
- Conditions of fossil preservation
- Relative dating using 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.
Earning College Credit
Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.
To learn more, visit our Earning Credit Page
Transferring credit to the school of your choice
Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.
Other chapters within the AP Environmental Science: Homework Help Resource course
- Introduction to AP Environmental Science: Homework Help
- AP Environmental Science - Plate Tectonics: Homework Help
- AP Environmental Science - Earthquakes: Homework Help
- AP Environmental Science - Volcanoes: Homework Help
- AP Science Homework Help - the Environment and Atmosphere
- AP Environmental Science - Weather and Storms: Homework Help
- AP Environmental Science - Water Balance: Homework Help
- AP Environmental Science - Running Water: Homework Help
- AP Environmental Science - Ground Water: Homework Help
- AP Environmental Science - Glaciers: Homework Help
- AP Environmental Science - Oceans: Homework Help
- Water Issues in AP Environmental Science: Homework Help
- AP Environmental Science - Minerals, Rocks & Soil: Homework Help
- AP Environmental Science - Ecosystems: Homework Help
- AP Science Homework Help: Interaction Among Organisms in the Ecosystem
- AP Environmental Science - Evolving Ecosystems: Homework Help
- AP Environmental Science - Biological Science: Homework Help
- AP Science Homework Help: Population & the Environment
- AP Science - Food & Agricultural Resource: Homework Help
- AP Environmental Science - Land Use: Homework Help
- AP Environmental Science - Mining & Fishing: Homework Help
- AP Environmental Science - Energy Concepts: Homework Help
- AP Environmental Science - Renewable Resources: Homework Help
- AP Environmental Science - Nonrenewable Resources: Homework Help
- AP Science - Hazardous and Solid Waste: Homework Help
- AP Science Homework Help: Human Impact on the Environment
- Environmental Sustainability: Homework Help for AP Science
- Environmental Risk Analysis: Homework Help for AP Science
- AP Science Homework Help: Global Environmental Economics
- Environmental Politics & Ethics in AP Science: Homework Help