ScienceMakers Toolkit Manual - The History Makers

10. Dr. Pettigrew specializes in non-invasive cardiac imaging. Explain in medical terms what
“non-invasive” means. Why is this such a drastic improvement over earlier procedures? Describe earlier
methods of “seeing” inside the body. (See NIBIB page)
11. Dr. Pettigrew is the fi rst director of the NIBIB. What does this stand for? Why is this organization
signifi cant? Research its mission and vision. Explain how it seeks to contribute to the health sciences.
(See NIBIB page)
Additional Reading
NIBIB page - http://www.nibib.nih.gov/About/Directories/Pettigrew
JustGarciaHill biography – http://justgarciahill.org/index.php?option=com_content&view=article&id=98:pett
igrew-roderic-i-md-phd&catid=6:biographies&directory=18
Experiment - Exploring With Sound
Adapted from: JASON Foundation for Education.
Objective
Use sound to fi gure out, or infer, the position of objects.
What You Need
• Shoe box with cover
• Tape
• Marble
• Several rectangular blocks
To Do and Observe
1. Do this experiment with a partner.
2. Tape the blocks to the inside of the bottom of the shoebox. Don’t show your
partner where you’re taping them. Place a marble in the box. Tape the lid shut.
Give the box to your partner.
3. Challenge your partner to fi gure out the position of the blocks by listening to
the marble as it rolls inside the box.
4. Have your partner draw a map of the inside of the box. Were they right? Open
the box and check. You’ve just created an image of something that you couldn’t
see.
What’s Going On
Sound helps you discover the position of the blocks in the shoebox. The movements and collisions of the marble
are the source of the sound. By interpreting the sounds of the marble, you can infer the position of the block.
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Life Science