we know that it is very cold on mars.scientists recorded the temperature of mars in several places on the planet. they took these temperatures to discover the average temperature on mars, which is minus 60 degrees Celsius. because the temperature is so low,
there is on liquid on mars, only ice. Carbon dioxide (a gas) is trapped in this ice-it cannot get out. however, heat can melt the ice and turn it into water. this can release the carbon dioxide and let it into the atmosphere. when the level of carbon dioxide increases in the atmosphere, mars will become warmer.