Each group will look up the information needed then report their findings to the class. Their classmates need to record the data on their own data sheets. You need to determine what resources they use, whether it's the internet, encyclopedias, or other library sources. Saturn . . . . . . . . Uranus . . . . . . . .
Students have difficulty imagining the actual size of the planets.
Making a scale model will help them visualize the differences in size. Students need to know or learn diameter and circumference before they build their models. Marilyn Burns has some great activities for diameter and circumference exploration. Have groups figure out the scale diameter and the scale distance for their planet. Have groups share their results with the class.