How does the Earth’s rotation affect objects moving over its surface? This kit allows students to observe the Coriolis effect simply and clearly with a ¾"-diameter steel ball and a revolving turntable that shows a visible yet erasable mark from the ball’s path. See how the ball’s path is unaffected when the platform is static, but curved when the platform is revolved to simulate the Earth’s rotation. Activity sheets guide students as they investigate the Coriolis effect in the Northern and Southern hemispheres and observe its influence on atmospheric circulation. 14"-diameter platform. This kit will serve one lab group of 3–4 students.