Part A
Time Scale Traveling
To best understand Earth's history, you need to be comfrotable with the geologic time scale. For many weeks, you have learned about the many different subdivisions of the time scale. Being comfortable with the all the number ages and the strange time terminology is a really important part of understanding Earth's ancient past.
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Figure 16-2. The Grand Canyon is a great natural laboratory for studying earth's past, whether it's from the rim or far below along one of the trails. At left, Brandon describes the landscape by sketching the geology of the Cape Royal area of the North Rim. At right, Brad in search of trilobites along the Tonto trail near Pipe Creek. |
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A simplified geologic time scale constructed from the 2020/03 ICS time scale is shown in Figure 16-3. It is not drawn to scale as its focus is including all of the Periods of the Phanerozoic Eon and all of the Epochs of the Cenozoic Era.
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Figure 16-3. Geologic time chart compiled from the 2020/03 ICS version. |
The following questions refer to the simplified geologic time scale you've been using all semester (see Figure 16-3).
Eons & Eras
Know Your Periods
Quiz Me! questions A03 through A08 are included in a DragNDrop activity (worth 6 points).
All About Epochs
Quiz Me! questions A09 through A15 compose an Ordering activity (worth 7 points).
Event Calendar
Quiz Me! questions A16 through A21 are combined in another DragNDrop activity (worth 6 points) that correlates events in Earth's geologic history with the geologic time scale in Figure 16-3.