Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No...
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Transcript of Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No...
![Page 1: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/1.jpg)
Work Sample
How Big Was the Skull?
![Page 2: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/2.jpg)
The Find• I found a ground sloth
tooth in Wilsonville, Oregon
• No other fossil material was located in that area
• It measures 22.70mm x 13.85mm
• The tooth is the third left tooth of a cranium from a Megatheriium ground sloth
http://www.fossil-treasures-of-florida.com/harlans-ground-sloth.html for the color photo of the toothB. J. Shaw: American Museum of Natural History specimen
![Page 3: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/3.jpg)
Question
• Can I determine the size of the skull based on a single tooth?
• How could I do that?
http://apod.nasa.gov/apod/image/0507/impact13sec_deepimpact_hri.jpg
![Page 4: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/4.jpg)
Hypothesis
• Develop a hypothesis about the outcome of your experiment based on your observations, reading, and experience
B. J. Shaw, American Museum of Natural History
![Page 5: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/5.jpg)
Experimental Design
• Let’s figure this out together
• We need a plan• We need a data sheet• How will you analyze
these data?• Do we need to modify
our hypothesis?
B. J. Shaw, American Museum of Natural History
![Page 6: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/6.jpg)
Collect Data
• You need to use calipers for taking precise measurements
• How to read a Vernier Scale (in mm)
![Page 7: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/7.jpg)
Practice
• What is this measurement?
![Page 8: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/8.jpg)
Practice
• What is this measurement?
• 8.65mm
http://www.southalabama.edu/physics/lab_setup/ph114_201/caliper%20(Small).jpg
![Page 9: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/9.jpg)
Analyze Your Data
• Your data sheet should be an organized table for collecting the measurements
![Page 10: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/10.jpg)
Analyze Your Data
• We discussed different ways of analyzing these data as part of our experimental design
• Is that still a good approach?– Does this make sense?
Skull Comparisons
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![Page 11: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/11.jpg)
Analyze Your Data
• How about a scatterplot, using an estimated least-squares line?– For those of you
working with 8th graders or advanced math students, you can have them calculate it
• Any other ideas for graphing?
Nine-Banded Armadillo Skulls
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Tooth Length in mmS
kull
Len
gth
in
mm
![Page 12: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/12.jpg)
Conclusions
• Was your guess correct?
• What is the estimated skull length?
• If you have any unusual data, give an education guess what happened (most likely, human error)
Nine-Banded Armadillo Skulls
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100
150
200
250
300
350
400
450
500
0 5 10 15 20 25 30 35 40 45
Tooth Length in mmS
kull
Len
gth
in
mm
![Page 13: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/13.jpg)
For This Lab…
• Produce an 8½ x 11” or larger “poster” of this experiment
• Introduction: Background on allometry and Xenarthrans
• List your citations
• Methods: Describe your experimental design (include your hypothesis)
• Results: Include a graph of your data
• Discussion: Was your prediction correct and what did you learn
![Page 14: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/14.jpg)
Be Creative
![Page 15: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/15.jpg)
Have Fun
![Page 16: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/16.jpg)
What Did You Learn?
![Page 17: Work Sample How Big Was the Skull?. The Find I found a ground sloth tooth in Wilsonville, Oregon No other fossil material was located in that area It.](https://reader036.fdocuments.in/reader036/viewer/2022062301/5697bfd11a28abf838cab5d6/html5/thumbnails/17.jpg)
Include 5 Sections