This courseware describes the development of people's understanding of the Earth's shape. In the past, there were different views, like the Earth being flat. Later, Aristotle, Magellan, etc. provided evidence that the Earth is spherical through observations and voyages. Now, it is widely accepted that the Earth is a sphere, which can be represented by a globe.

Main Content:
1.Looking Back: Early Conjectures about the Shape of Earth
2.Proving the Earth: Searching for Evidence of a Spherical Shape


This lesson teaches young students to create secondary green by mixing primary colors (blue + yellow), exploring different spring greens by adjusting blue/yellow ratios through theory and hands-on exercises to develop color perception and creativity.

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