Geologic Time Scale: Major Eons, Eras, Periods and Epochs


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Why do many geologists study layers of strata?

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1. How does an eon differ from an era?

2. The Mesozoic Era was the Age of Dinosaurs, and the current Cenozoic Era is the Age of _____.

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About This Quiz & Worksheet

These assessments can be used to review topics such as what the layers in sedimentary rock are called and the definition of an eon.

Quiz & Worksheet Goals

Within these assessments, you will review:

  • Layers in sedimentary rock
  • Definition of eon
  • Characteristics of the Cenozoic Era
  • What the epochs were in history
  • How the two major eons got divided

Skills Practiced

  • Interpreting information - verify you can read information regarding how the two major eons got divided and interpret it correctly
  • Distinguishing Differences - compare and contrast topics from the lesson, such as the Mesozoic Era and the Cenozoic Era
  • Defining key concepts - ensure that you can accurately identify the epochs in history

Additional Learning

Review the lesson called Geologic Time Scale: Eons, Eras, Periods and Epochs to further your knowledge on these concepts. Through this lesson, you will also:

  • Define geologic time scale
  • Identify how scientists study the layers in rock
  • Describe how the time scale was created
  • Understand how the scale tells the story of Earth's history
  • Appreciate the major divisions within the scale