The period of revolution of Mars is 686.98 Earth days, and the period of rotation of Mars is 1.03 Earth days. A planet's period of revolution is the length of one year, or how long it takes the planet to revolve around the sun. A planet's period of rotation is the length of one day; that is, how long the planet takes to rotate once.
The atmosphere on Mars is 95 percent carbon dioxide, 3 percent nitrogen and 1.6 percent argon. The temperature on the surface of the planet ranges from 150 degrees Kelvin (-189.67 degrees Fahrenheit) to 310 degrees Kelvin (98.33 degrees Fahrenheit).