How does the atmosphere on earth compare to the atmosphere of Mars?

The size, composition, and inclination of Earth and Mars are all similar; but how similar are their atmospheres?

The troposphere, stratosphere, mesosphere, thermosphere, and exosphere are the five main layers that make up Earth's dense atmosphere; in contrast, Mars' atmosphere is extremely thin and makes up only 1% of Earth's at sea level.

Mars' atmosphere is made up of 96% carbon dioxide, 1.93% argon, and 1.89% nitrogen along with traces of oxygen and water. Recent surveys have also noted trace amounts of methane, with an estimated concentration of about 30 parts per billion. Earth's atmosphere is primarily composed of nitrogen (78%) and oxygen (21%), with trace concentrations of water vapor, carbon dioxide, and other gaseous molecules.

The temperature ranges within the atmosphere of Earth and Mars are significantly different due to variations in atmospheric densities and distances from the sun. The former typically ranges from 14 degrees Celsius to 70.0 degrees, while the latter ranges from -146 degrees Celsius to -140 degrees Celsius.

The atmosphere on Earth is primarily composed of nitrogen (78%) and oxygen (21%) with trace amounts of other gases, while Mars has a thin atmosphere composed mainly of carbon dioxide (95.3%) with very little oxygen and nitrogen. Earth's atmosphere provides a stable environment for life and protects the planet from harmful solar radiation, while Mars' atmosphere is too thin to support life as we know it and offers little protection from radiation. Additionally, Earth's atmosphere facilitates weather patterns and climate regulation, whereas Mars experiences extreme temperature fluctuations due to its thin atmosphere.