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This lesson introduces students to the intuitive arguments for a spherical Earth, the observations and measurements by Eratosthenes, and the circumference of Earth. Students need to have background knowledge in ratios, proportions, and algebraic problem solving.
This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of -0001-11-30.
This resource received a 3* rating because it is part of the larger resource A Tour of the Universe, which received a rating of 3-Exemplary in the Curriki Review System. You can learn more about this larger resource by reading its review and comments.