students are using balloons to describe the expanding universe model. The students blow up several balloons and put them on the floor. Each balloon represents a different galaxy. How should the students move or change the balloons to demonstrate how the universe is expanding
A: all of the balloons should be moved to the center of the floor
B: each balloon should be inflated more so that they are all increasing in size
C: each balloons should be deflated, so that there is more distance between the surface of each balloon
D: all of the balloons should be moved away from each other so there's more distance between them
1 answer
D: all of the balloons should be moved away from each other so there's more distance between them