Cut one of your Styrofoam balls, once it is dry, in half with the knife. Referring to your cell picture, use different-colored permanent markers to draw the inside parts of the cell with colors that match the picture. The second Styrofoam ball will be used to represent the outside of th...
Widen the compass for the outer planets. These planets, which are beyond the asteroid belt, have larger orbits than the solid planets. Create orbits for Jupiter, Saturn, Uranus and Neptune. Take your nail and punch a hole along each orbit to mark where the planet will hang from. You will...