1. Heat Receptors in the hand
By: Bahdah Shin
PURPOSE: The purpose of this data report is to find the point of the hand feeling
cold or hot.
PROCEDURE: Map hot and cold temperature sensors on the front of a partner's
hand. Draw a one-inch square (2 cm) in washable ink, then use a nail in hot or cold
tap water and gently touch the nail to areas in the square, marking hot and cold
receptors with different colors.
DATA/RESULTS:

2. CONCLUSION: You feel heat because of your nerve cells. From this data, the
fingers can feel heat in the level 3 category because the skin is thicker. This make
sense because the fingers are usually the first thing to touch objects, even in
unexpected cases. The center of the hand is more sensitive to heat because the
center has a thin layer of skin and is more closer to nerve cells. Most of the times,
the bottom right hand can't really feel anything because of really thick skin. The
other parts of the hand is categorized in 4-5 because of the mussels.
Summery: To do this project, I asked my dad to be my partner. I drew a one-inch
square in washable pen. To get the data I need, I heated a metal chopstick in the fire
for 1 minutes.Then, I cooled the chopstick in the water for a millisecond so my
partner wouldn't be burned and still be hot. I gently touch the squared part of the hand
with the metal for 2 seconds, then wait for 10 seconds. Afterward, I mapped my dad's
hand using the number scale. The number scale is using a number 1-5. 1 is cold and 5
is hot. This was more acurate than the hot and cold scale, where you just use hot and
cold.
Credits:
http://www.oglethorpe.edu/faculty/~m_rulison/Astronomy/Dictionary/Infrared
%20Radiation_files/10micron_hand.gif