The length of a football field is 100 yards. When you compare geologic time (4.6 billion years) to
the length of a football field, you will find that each yard on the field will equal 46 million years,
and each 10-yard section will equal 460 million years. Use this information to complete the
activity below.
Create a digital model of a football field. Starting at the left and moving forward in time, label the
10-yard lines in years. Using different colors, draw a horizontal line to mark the beginning and
end of each of the following periods and eras [note that the years have been rounded up for this
activity]:
• Cenozoic era (65 MYA to present)
• Cretaceous period (146‒65 MYA)
• Jurassic period (208‒146 MYA)
• Triassic period (245‒208 MYA)
• Paleozoic era (570‒245 MYA)
• Proterozoic era (2,500‒570 MYA)
• Archean era (3,800‒2,500 MYA)
• Hadeanera(4,600‒3,800MYA)
For example, to calculate where to mark the Cenozoic era, calculate:
⋅ 1 yard 65 million years 1.4 yards 46 million years ≈
The Cenozoic era should be marked approximately 1.4 yards from the right end of the football field.
Review your model with your Learning Coach, and submit to your teacher for grading.
i honestly have no idea
To create a digital model of a football field and mark the different periods and eras, we can follow these steps:
1. Calculate the number of yards for each period/era:
- Cenozoic era (65 MYA to present): 65 MYA / 46 million years per yard
- Cretaceous period (146‒65 MYA): (146 MYA - 65 MYA) / 46 million years per yard
- Jurassic period (208‒146 MYA): (208 MYA - 146 MYA) / 46 million years per yard
- Triassic period (245‒208 MYA): (245 MYA - 208 MYA) / 46 million years per yard
- Paleozoic era (570‒245 MYA): (570 MYA - 245 MYA) / 46 million years per yard
- Proterozoic era (2,500‒570 MYA): (2,500 MYA - 570 MYA) / 46 million years per yard
- Archean era (3,800‒2,500 MYA): (3,800 MYA - 2,500 MYA) / 46 million years per yard
- Hadean era (4,600‒3,800 MYA): (4,600 MYA - 3,800 MYA) / 46 million years per yard
2. Create a digital representation of a football field (typically 100 yards long) with appropriate dimensions.
3. Starting from the left end, measure the calculated number of yards for each period/era and mark the 10-yard lines accordingly.
4. Use different colors to draw horizontal lines to mark the beginning and end of each period/era.
5. Review your model with your Learning Coach to ensure accuracy.
6. Finally, submit your model to your teacher for grading.
By following these steps, you will be able to create a digital model of a football field labeled with the appropriate periods and eras in geologic time.