Give your students a stellar introduction to the universe with these two activities, which explore galactic rotation and the expanding universe. The printable handouts include experiment directions and a worksheet for students to complete.
The Spin Is In Introduce students to different-shaped galaxies and how galaxies form with this activity in which students model galactic rotation. Using cups of water and dry powdered milk, they will learn how gravity and the speed of rotation can alter a galaxy's structure.
Big Bang Balloon Modeling how the Big Bang has created an expanding universe is a great way for students to understand that the distance between objects in the universe continues to expand along with the universe, itself. This simple activity requires only balloons, felt-tip markers, string, and rulers.