Quick Answer: The Shape of Earth due to Rotation model demonstrates how rotation causes equatorial bulging and polar flattening, showing why Earth is an approximately oblate spheroid rather than a perfect sphere.
Last updated: October 2026
Key Features
Demonstrates the link between rotation, equatorial bulging and polar flattening
Introduces the term oblate spheroid in Earth science lessons
Students compare the shape at rest and during rotation
Useful in astronomy, physics, geography and general science teaching
About This Product
Students first look at the demonstration body while the apparatus is stationary, then watch its shape change as rotational motion is introduced. The equatorial region becomes comparatively wider while the poles flatten, turning an abstract planetary effect into something visible on the bench. The model supports lessons on Earth's rotation and can be paired with an Astronomy Lab Kit covering revolution, seasons and eclipses. The Shape of Earth due to Rotation is available for supply within India and for export to Sudan, Kazakhstan, Vietnam, Malaysia and Montenegro.
Frequently Asked Questions
Q1. Why is Earth not a perfect sphere? Rotation makes Earth slightly wider around the equator and slightly flattened at the poles. The model reproduces this effect so students can watch the oblate form develop.
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