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Looking at the Inner Planets

Mars is the fourth volcanoesplanetorbitmoonsSelect your answer from the Sun. It takes two years for Mars to volcanoesorbitcarbon dioxidesurfaceSelect your answer the Sun. Most of Mars's thin atmosphere is made up of surfacecarbon dioxidevolcanoesorbitSelect your answer. Craters and moonsvolcanoescarbon dioxideplanetSelect your answer, including one of the highest in the solar system, cover its surface. With its reddish moonsplanetsurfacevolcanoesSelect your answer, Mars is known as "the red planet." This red planet has two moonsplanetvolcanoessurfaceSelect your answer.