| A | B |
|---|
| Has the shortest period of revolution | Planet Mercury |
| This planet has very little atmosphere | Planet Mercury or Mars |
| This planet has a very thick atmosphere made up mainly of soulfuric acid | Planet Venus |
| Revolves the other way around the sun | Planet Venus |
| Has a largeplauteau named Ishtar Terra | Planet Venus |
| Has craters like our moon | Planet Mercury |
| The smallest of all the inner planets | Planet Mercury |
| Is extremely cold at night and hot during the day because it has very little atmosphere | Planet Mercury |
| Atmosphere is mainly Hydrogen and Helium | Planet Mercury |
| Has a greenhouse affect because atmosphere is made up mainly of carbon dioxide and a cloud of sulfuric acid | Planet Venus |
| Has three forms of water | Planet Earth |
| Has very few crators due to its atmosphere | Planet Earth |
| This planet is red because of iron oxide | Planet Mars |
| Has a large canyon called Valles Marineris | Planet Mars |
| Has the largest volcano in the solar system- Olympus Mons | Planet Mars |
| Is the forth planet from the sun | Planet Mars |
| Is the third planet from the sun | Planet Earth |
| The inner planets are mainly rock are called | Terrestrial |
| Its day is longer than its night | Planet Venus |
| Channels on surface could have been formed by water | Planet Mars |
| These two inner planets are similiar in size | Venus and Earth |
| These three terrestrial planets have the same chemicals in their atmosphere | Venus, Earth and Mars |
| These inner planets move in elliptical orbits | All of them |
| It's poles are made up of frozen carbon dioxide- dry ice | Mars |
| These inner planets do not give off light | All of them |
