Today's Classroom Activities :

Springtime Sundials

Springtime Sundials
Science Students can experience firsthand the oldest known way for measuring time. Using a compass, make a flat circle of 10"-12" diameter. Stand a pencil upright in the center hole left by the compass. Place it in direct sunlight. Mark the position of the shadow and write down the time. Challenge students to use the sundial for a few sunny days in a row. Will it remain constant? What could cause it to become faulty?

What has man used to tell time? Create a list of clocks through history. Make a sundial or hourglass (sand clock). How closely can you estimate time?

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