Mars, the red-planet is said to have emerged from the earth as a result of some massive explosion after the big-bang so, the mars has several rocks and minerals. Amongst all minerals, iron is the most prominent one. The atmosphere of Mars has some amount of carbondioxide hence, at high temperature the oxygen from the carbondioxide combine with the iron resulting to form iron oxide which mixes with soil of the mars and imparts red color to the planet's surface.