About This Chapter
Understanding Earth's Formation & Development - Chapter Summary
In this self-paced chapter, our expert instructors outline the Earth's development and formation. You'll study theories of geological evolution, the geologic time scale and different kinds of geological dating. Once you watch all of the video lessons in this chapter, you should be able to complete these objectives:
- Discuss different theories about the formation of the Earth
- Detail the composition of Earth's atmosphere
- Identify the major eras, periods, epochs and eons of the geologic time scale
- Differentiate between the geological evolution theories of catastrophism and uniformitarianism
- Outline the history of life on Earth
- Explain relative and numerical geological dating
- Describe the use of index fossils as indicators of time
Our mobile-friendly learning tools ensure you're able to study when and where it's convenient. If you don't want to watch an entire video lesson, simply navigate to the section you'd like to see using the timeline feature. Our printable lesson transcripts make handy study guides for offline use.
1. Formation of the Earth: Theories
In this lesson, the theory of how the planet Earth formed will be discussed. This includes looking at how it differentiated into three layers, how it formed its atmosphere, water, and land features, and how it continues to evolve today.
2. The Atmosphere on Earth
This lesson describes the evolution of the Earth's atmosphere, from its ancient past to the present day to how it's being changed by humans today. You'll learn about how outgassing, photosynthesis, and oceans all played a role in its formation, what air is composed of, and the real effect of human pollution on our changing atmosphere.
3. 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.
4. 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.
5. The History of Life on Earth: Timeline and Characteristics of Major Eras
The Earth is over 4.6 billion years old. Ever wonder what happened during certain time periods in that large amount of time? We will look at the major eons and eras of Earth's history along with important characteristics of each.
6. Numerical and Relative Geological Dating
Don't worry, this lesson isn't about how to take a stone out to dinner. Instead, it is about how geologists and archaeologists use different techniques to figure out how old rocks and other artifacts are.
7. 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 CSET Science Subtest II Earth and Space Sciences (219): Test Prep & Study Guide course
- Understanding Stars, Solar Systems & Galaxies
- Celestial Bodies of Our Solar System
- Astronomical Laws & Measurements
- Rocks & Minerals
- Overview of Earth's Systems
- Tectonic Plates, Volcanoes & Earthquakes
- Understanding Water's Role on Earth
- Understanding Earth's Atmosphere, Climate & Weather
- Understanding Human Impact on Earth & Global Climate Change
- California's Natural Resources & Hazards
- CSET Science Subtest 2 Earth & Space Sciences Flashcards