Water, atmosphere.
It is not. Mars is a planet, a mass of rock and minerals. So far, we have detected no certain evidence that there are any living things on Mars, although our half-dozen or so landers could easily have missed some unusual or strange form of life. And it's possible that there once WAS life on Mars, but that it has died off long since.
Neptune is much colder than Mars.
Mars is the second smallest planet. Only Mercury is smaller.
Inner, cause there is a ring of asteroids between Mars and Jupiter so therefore that makes it an inner planet & not an outer planet.
there is NO living life on Mars b/c there is no liquid water on it.
As far as we know, Mars does not have any confirmed current life forms. However, there is evidence to suggest that Mars may have had conditions suitable for life in the past. Further exploration and research are needed to determine if there is or was life on Mars.
100% of the surface of mars is land. There is no surface water on mars
Pluto but if you dont count that as a planet then Mercury.
Mars is very similar to Earth. Mars' year and day are very similar to Earth compared to other planets.
its location and rockey surface
Mars
because its small and solid