Question

eratosthenes determined the circumference of earth by conducting an experiment. put his steps in order as they correlate to the scientific method. make observations and collect data: in syene, the suns rays are vertical at noon. at the same time in alexandria, the rays are 7.2 degrees from the vertical. state the problem: how can we prove earth is round and calculate its circumference? make a hypothesis: if the sun casts shadows at different angles at the same time of day in different places, we can determine how much earth curves.

Explanation:

The scientific - method steps are: first state the problem, then make a hypothesis, and finally make observations and collect data.

Answer:

1. State the Problem: How can we prove Earth is round and calculate its circumference?
2. Make a Hypothesis: If the sun casts shadows at different angles at the same time of day in different places, we can determine how much Earth curves.
3. Make Observations and Collect Data: In Syene, the sun's rays are vertical at noon. At the same time in Alexandria, the rays are 7.2 degrees from the vertical.