Eratosthenes determined the circumference of Earth by conducting an
experiment. Put his steps in order as they correlate to the scientific method.

Conduct an Experiment: Measure the angle of shadow at high noon
in Syene and Alexandria,
Make Observations: In Syene, the sun's rays are vertical at noon.

At
t the same time in Alexandria, the rays are 7.2 degrees from the
vertical.

Draw Conclusions: The angle represents the amount Earth curves
between Syene and Alexandria. This is 1/50 of a complete circle and
1/50 of Earth's circumference.