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PASSPORT TO KNOWLEDGE - To MARS with MER

 

 

 

 

If most of the hydrogen on Mars is in the form of water ice why is there so little oxygen in the atmosphere and on the surface?
Gabriel
Fort Collins, CO

On Mars most of the oxygen is tied up in the rocks and minerals. On Earth, most of the oxygen in the atmosphere has been generated by plants. So since there aren't any plants on Mars there is very little oxygen in the Martian atmosphere. On the order of one tenth of a percent.
Joy Crisp
Project Scientist
Mars Exploration Rover Mission