The Noon Day Project
Short Description
Over 2200 years ago Eratosthenes made a remarkably accurate measurement of the earth's circumference. This project offers students an opportunity through collaboration to recreate his amazing experiment using sticks, shadows, and ingenuity.
Subject
- Geometry
- Measurement
- Earth Science
Technology Needed
Internet and email connectivity (at least one)
Time Commitment
Can vary depending on the grade level and student's experience. An outdoor activity is required.
Registration Information
Send an email to icharisc@stevens-tech.edu indicating your intention to participate.
Registration Deadline
2/29/00
Full Project Description
Summary: Over 2,000 years ago Eratosthenes made a remarkably accurate measurement of the earth's circumference. This project requires collaboration of students in places at different latitudes of the earth to make some simple measurements, share data, use a spreadsheet to make comparisons, and then replicate and share their results. Here is a summary of the steps involved in making the measurements:
1. At least two sites must collaborate whose latitudes (north-south distance) are different enough to give a significant difference in measurements.
2. On the given date (between March 17th and March 24th (weather permitting) students will conduct their measurements outdoor at high noon, local time.
3. Using a standard meter stick each team of students will:
- lay out a piece of paper flat on the ground
- hold the meter stick perfectly vertical. (It may be taped to a metal book end, set in sand inside a liter plastic bottle, etc.)
- mark on the paper the end of the shadow at one minute intervals over a ten to twenty minute period.
- several measurements should be made by several different students or teams of students the more the better.
- measure the length of the shadow cast by the meter stick to the nearest centimeter and these measurements will then be analyzed by the students.
- using statistical computations the class should arrive at what they feel is the length of the shadow cast at local noon (which should be the time of the shortest shadow).
4. This length of the shadow at local high noon and the date on which the measurement is taken will be posted on the Web.
5. This data along with the latitude for each site is enough information to use a simple proportion to make a fairly accurate calculation of the Earth's circumference as determined by each pair of sites.
Number of participants: unlimited
Project Coordinators:
Ihor Charischak
(icharisc@stevens-tech.edu)
Center for Improved Engineering & Science Education
Stevens Institute of Technology
Hoboken, New Jersey
Kenneth Cole
(kennethcole@home.com)
Emerging Technology Teacher,
Faubion Middle School
McKinney, Texas
Registration Information: It is NOT necessary to register for this project. There is no fee associated with this project. If you decide to participate in the project,
Sites to visit:
"How Round is the Earth?" - Noon Day Project Page
http://www.ciese.org/noonday/noon.html
Faubion Middle School's 1999 Noon Day Project Page
http://www.kencole.org/noon/
Project Objectives
To recreate the remarkable measurement of the circumference of the earth that was done over 2000 years ago. Using only simple tools such as rulers, protractors, and meter sticks, students will measure shadows cast by a meter stick at different locations on the earth..
Assessment
Individual school projects posted on website
Sponsored by
A joint venture of the Stevens Institute of Technology's Center for Improved Engineering & Science Education (CIESE), Hoboken, NJ and the Faubion Middle School in McKinney, Texas
