|Chapman Elementary School, Dublin, Ohio, USA
1. We decided to participate in the noon day project because the students were studying a unit on the impact of technology on our lives. We felt this project would be a good example of using technology (computers and internet). To prepare for the noon day project, the students and teachers read a book on Erastosthenes and did a lesson on earth modeling based on the book and the Foss science kit .
2. On Thursday, the week of spring solstice we had a clear day; three classes made shadow and angle measurements at 10 minute intervals using a vertically placed meter stick:
12:25 - Kristi Jerger's 5th grade class
12:35 - Flora Marlatt's 3-4 grade class
12:40 - Mike Wagner's 3-4 grade class
We got the shortest shadow (high noon) at 12:35 and a sun shadow measurement of 39.5 degrees north latitude. We discussed why high noon in Columbus, OH, is past 12:00 ... we are located near the western edge (vs. midway) of the eastern time zone. Later, we noted that our sun shadow measurements and our geographic north latitude were nearly the same.
3. Later I did the following lesson to calculate the earth circumference with Flora's students.
Written by Marlin Languis, School Volunteer
Professor of Science Education, Ohio State University (retired)