The atmosphere of the planet Mars is 95.3% carbon dioxide (CO2) and about 0.03% water vapor. The

Question:

The atmosphere of the planet Mars is 95.3% carbon dioxide (CO2) and about 0.03% water vapor. The atmospheric pressure is only about 600 Pa, and the surface temperature varies from – 30oC to -100oC. The polar ice caps contain both CO2 ice and water ice. Could there be liquid CO2 on the surface of Mars? Could there be liquid water? Why or why not?