In this activity, students will model Kepler's 3 laws of planetary motion. They will calculate the eccentricity and orbital velocity of the ellipses they draw, and then model orbital velocity with a washer and string. Each group will need: a piece of cardboard, 2 thumbtacks, a ruler, 2 colored pencils, string, 2 washers, and a straw. Check out the preview for more details.Included in your purchase:- 3 page student worksheet- Teacher directions- Answer keyThis PDF is not editable.You might also b