Student exploration solar system answer key download student exploration solar system vocabulary atmosphere ellipse gas giant gravity inner planet orbit outer planet planet rocky . The solar system explorer gizmotm shows a model of the solar system all of the distances but not the sizes of the planets are shown to scale to begin turn on show orbital paths and click play you are looking at the four inner planets. Solar system explorer vocabulary astronomical unit dwarf planet eccentricity ellipse gas giant keplers laws orbit orbital radius period planet solar system terrestrial planet prior knowledge questions do these before using the gizmo list all of the planets you can think of in our solar systemtry to list them in order from closest to farthest from the sun. Student exploration solar system answer key download student exploration solar system vocabulary atmosphere ellipse gas giant gravity inner planet orbit outer planet planet rocky planet solar system year prior knowledge questions do these before using the gizmo name all the planets you can think of what object is at the center of the solar system what force keeps the planets . Students are not expected to know the answers to the prior knowledge questions 1 list all of the planets you can think of in our solar system try to list them in order from closest to farthest from the sun answers will vary mercury venus earth mars jupiter saturn uranus and neptune 2 which planets are most like earth