Visibility of eTwinning Projects Group July 2025 Newsletter
• measure the distance based on the road network.
• measure the distance between the schools along the same meridian.
To obtain accurate results, the stick must be:
• Handheld
• Stuck into the ground
• Fixed on the ground
• Leaning against a wall
For the shadow of the stick, we must:
• Take multiple measurements and calculate the average value to avoid errors
• Take the lowest value, as it has the least margin of error
• Take the lowest value because that is when the sun is at its highest point
• Take multiple measurements and calculate the average value, because we cannot know the exact moment the sun is at its zenith
Use Google Earth to find the distance between the two partner schools.
The experiment must be carried out when the sun is in the same position for each school. Therefore, each school will conduct the experiment when the sun is at its highest point.
Determine when the sun is at its zenith for each location.
Measure the length of the stick and record the measurement in the table below.
At the scheduled time for the experiment, measure the length of the stick’ s shadow.
Repeat the measurement 5 times and record the values in a table that has columns for: solar noon, school latitude, school longitude, gnomon in centimetres, shadow in centimetres, angle of the sun, gnomon medium.
Conduct the Investigation Place the stick in the sunlight and make sure it is perfectly vertical relative to the ground.
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