Journal ArticleDigital resources are stored online in your NSTA Library.
The tilt of the Earth on its axis and the manner in which sunlight strikes the Earth remains one of the most misunderstood concepts taught in an introductory astronomy course. The misconceptions that surround the reasons for the seasonal variations we experience on Earth often go unchanged as students’ progress through their education. To help students to understand the world in which they live, the activity described in this article allows students to create a physical model of the Earth-Sun system to help them better understand the effect the tilt of the Earth has on the length of the day. In addition, they utilize the internet to collect and analyze data for themselves.