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Visual Learning Systems
The Earth: From Flat to Round
In this video, we learn about the historical belief that the Earth was flat and how it has been proven to be spherical through photographs taken in space. This video is part of the 11-part series, Earth, Sun, and Moon.
MinutePhysics
Top 10 Reasons Why We Know the Earth is Round
Top tens lists are a lot of fun, and this one is educational as well! Viewers of the video find out ten reasons we know that the earth is not flat, as the pre-Colombus world believed. Some of the reasons are obvious, some are common...
Curated OER
Why is the Earth Round?
When you look out to the horizon, the earth looks flat, so how do we know it's round? We learn that gravity pulls planets toward the center and shapes them into the spheres that dominate space. This is a great clip that fully explains...