Why is Mars called "the Red Planet"?

Answer

Mars has been given the moniker "the Red Planet" because it has a bright red color. This reddish colors probably marks the areas that are like deserts on the Martian landscape; the grayish areas are the liquid parts.

The element iron is behind the redness of the planet. On Earth, when iron rusts, it takes on an orange-red color. The same thing happens on Mars. When the iron on the Martian surface "rusts" or becomes oxidized, the result is an orange-reddish hue. When oxygen and iron meet, rust forms.

On Mars, the source of oxygen for oxidizing iron comes from carbon dioxide and water vapor. Both these molecules are abundant in the Martian atmosphere.

Q&A Related to "Why is Mars called "the Red Planet"?"
Earth was already taken! Mars is called the Red Planet because there are gases that surround it that give it the appearance of being red. There's also red in their dirt.
http://www.ask.com/web-answers/Science/Other/why_m...
its surface is coverd with red,dusty soil.
http://wiki.answers.com/Q/Why_is_mars_called_the_'...
Mars is often called the Red Planet, because the rocks on the surface
http://www.chacha.com/question/why-is-mars-sometim...
It is due to the presence of higher content of Iron Oxide on Mars due to which it has reddish appearance. Thus it's known as RED PLANET.
http://answers.yahoo.com/question/index?qid=201205...
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