About This Chapter
Understanding Earth's History - Chapter Summary
Work through this chapter at your own pace to better understand the history of our planet. Our expert earth science instructors explain several Earth formation and geological evolution theories as well as information pertaining to the sun's structure and the major eras of Earth's history. Each lesson comes with a short quiz, and the chapter concludes with a comprehensive exam. You can also submit questions to our instructors if you need any extra help. Upon completion of the chapter, you should be able to:
- Evaluate theories regarding the formation of the Earth and moon
- Outline the sun's structure
- Differentiate between the geological evolution theories of catastrophism and uniformitarianism
- Summarize the history of life on Earth
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. Formation of the Moon: Theories
Explore the four major theories on the formation of the Moon. The theories include the fission theory, capture theory, condensation theory and giant impact theory. Also look at both information supporting and flaws found in these theories.
3. Structure of the Sun
Discover the layers of the sun, including the core, radiative zone, convective zone, photosphere, chromosphere, and corona. Find out which layers you can see from Earth. Investigate what sunspots and solar flares are.
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 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.
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Other chapters within the UExcel Earth Science: Study Guide & Test Prep course
- Basic Earth Science Concepts
- Understanding Geologic Time
- The Properties of Matter
- Overview of Earth's Spheres & Internal Structure
- The Lithosphere
- Overview of Minerals & Rocks
- Igneous Rocks Basics
- Weathering, Erosion & Wasting
- Sedimentary & Metamorphic Rocks
- Geological Forms
- Water Balance
- Understanding Running Water
- Overview of Groundwater Systems
- Life Cycle of Glaciers
- Properties of Oceans
- Basics of Coastal Hazards
- The Atmosphere
- Weather and Storms
- Understanding Earthquakes
- Understanding Energy Resources
- UExcel Earth Science Flashcards