About This Chapter
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- Identify the lessons in the ScienceFusion Geologic Time Scale chapter with which you need help.
- Find the corresponding video lessons with this companion course chapter.
- Watch fun videos that cover the geologic time scale topics you need to learn or review.
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Students will learn:
- Branches of geology
- Geological evolution theories
- Definitions for what eons and eras are
- Facts about the Precambrian period
- Events during the Paleozoic Era
- The Mesozoic Era's timeline
- The periods that make up the Cenozoic Era
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1. The Main Branches of Geology
Although many people think the field of geology focuses solely on rocks, there is much more behind this scientific field. Geology has many different branches that each focus on interesting and unique features of our planet and beyond.
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. 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. The Precambrian Period: Events & Facts
The earth as we know it today is shaped by what happened during the Precambrian period, which covers four billion years! This lesson covers the events that shaped this important period.
5. The Paleozoic Era: Definition, Timeline & Events
The Paleozoic Era spans almost 200 million years from 542 to 251 million years ago. It is defined by great explosion of life at the beginning of the era and ends with the largest mass extinction in the history of our planet. This lesson will cover the important features of Paleozoic Era.
6. The Mesozoic Era: Facts, Events & Timeline
The Mesozoic Era began 252 million years ago with the largest mass extinction in Earth's history and ended 66 million years ago with the asteroid that killed off the dinosaurs. This lesson will cover the important events that occurred during the Mesozoic Era.
7. The Cenozoic Era: Definition, Time Period & Facts
The Cenozoic Era spans the previous 65 million years of Earth's history, beginning with the extinction of flightless dinosaurs and continuing up to the present. This lesson covers the events that shaped the Cenozoic Era.
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Other chapters within the ScienceFusion The Dynamic Earth: Online Textbook Help course
- ScienceFusion The Dynamic Earth Unit 1.1: Earth's Spheres
- ScienceFusion The Dynamic Earth Unit 1.2: Weathering
- ScienceFusion The Dynamic Earth Unit 1.3: Erosion & Deposition by Water
- ScienceFusion The Dynamic Earth Unit 1.4: Erosion & Deposition by Wind, Ice & Gravity
- ScienceFusion The Dynamic Earth Unit 1.5: Soil Formation
- ScienceFusion The Dynamic Earth Unit 2.1: Geologic Change Over Time
- ScienceFusion The Dynamic Earth Unit 2.2: Relative Dating
- ScienceFusion The Dynamic Earth Unit 2.3: Absolute Dating
- ScienceFusion The Dynamic Earth Unit 3.1: Minerals
- ScienceFusion The Dynamic Earth Unit 3.2: The Rock Cycle
- ScienceFusion The Dynamic Earth Unit 3.3: Three Classes of Rock
- ScienceFusion The Dynamic Earth Unit 4.1: Earth's Layers
- ScienceFusion The Dynamic Earth Unit 4.2: Plate Tectonics
- ScienceFusion The Dynamic Earth Unit 4.3: Mountain Building
- ScienceFusion The Dynamic Earth Unit 4.4: Volcanoes
- ScienceFusion The Dynamic Earth Unit 4.5: Earthquakes
- ScienceFusion The Dynamic Earth Unit 4.6: Measuring Earthquake Waves