# Lab: Puffy Head and Bird legs 2013

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Published on January 10, 2014

Author: FJHScience

Source: slideshare.net

18 STUDENT DATA SHEET Name: _____________________________________________ Date: ____________ Period: ______ INVESTIGATION QUESTIONS: 1. If your legs are raised above your head and torso, a. what would you expect the observable effect on your head to be? b. what would you expect the observable effect on your legs to be? 2. How would circulation be affected if gravity weren’t forcing blood down into the legs and feet of a standing person? INDIVIDUAL DATA: 1. 2. Describe the facial shape and skin features of the test subject prior to experiment. Measure the circumference of a calf prior to elevation (to the nearest millimeter): _________ 3. Describe the facial shape and skin features at the end of the experiment. 4. Did the test subject report any unusual feelings in the head and face? If so, describe them. 4. What was the circumference of the calf after elevation (to the nearest millimeter)? ___________ 5. What was the percent change in the circumference of the subject’s calf? _________ EQUATION: - % change = (Post Test Circumference Pre Test Circumference) X 100 Pre Test Circumference

19 Puffy Head, Bird Legs GROUP DATA TABLE: Compile data on the circumference of calves of test subjects before and after leg elevation. Student Name Pre Test (mm) Post Test (mm) % Change 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. GROUP DATA GRAPH: Remember to title and label your graph, including units of measurement.

20 CONCLUSIONS: 1. When a person’s legs are raised above the head and torso, do you observe any head and facial changes? If so, why do you think these changes occurs? 2. When a person’s legs are raised above the head and torso, do you observe any change in calf circumference? If so, why do you think this change occurs? 3. How would circulation be affected if gravity weren’t forcing blood down into the legs and feet of a standing person? 4. An astronaut with a “puffy head” and “bird legs” returns to Earth, after a short time in space. Would you expect these changes in his body to be permanent? Why or why not? Going Beyond: 1. If an astronaut walked around on a planet with 2 G (two times the gravitational pull of Earth), what changes would you expect in the face and head? 2. On the same 2 G planet, what changes would you expect in the circumference of the legs?

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