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Educational field courses for educators & students in
Costa Rica, Galápagos and beyond!
1-888-890-0632
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©Holbrook Travel, Inc. 2007 IMPORTANT LEGAL NOTICE:
Holbrook Travel believes all information to be accurate at the time of
publication. However, we reserve the right to make corrections. |
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Making a Sundial - from the GLOBE program
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In this activity, students follow the movement of the sun through the day using
a sundial.
A sundial is made up of a stationary vertical object, such as a pole, that is
positioned on a flat surface.
As the sun travels through the sky, the length and position of the shadow cast
on the ground changes, with the longest shadows at sunrise and sunset, and the
shortest shadow at local solar noon.
Activity and image courtesy of GLOBE
Take part in GLOBE
training in Costa Rica this summer!
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Procedure:
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Select a sunny day.
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Take students outside to find a flat area away from buildings and trees.
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Place the pole into the ground, making sure it is perpendicular to the ground.
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Ask a student to mark the end of the shadow with a numbered flag or stake. Ask
another student to measure the length of the shadow and record the measurement
and time of day in the table.
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Require a student to visit the sundial each hour to take measurements and
record data in the table.
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At the end of the school day, ask students to analyze the data and determine
the time of the shortest shadow. This is the observation closest to local solar
noon.
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Marker Number
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Time of Day
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Length of Shadow
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