How is the environment different between Mars and Earth?

Answer 1

Mars is smaller than earth with less gravity. It also has a very thin CO2 atmosphere where Earth has a Nitrogen-Oxygen atmosphere that is much thicker. Mars is also very cold while Earth is warm.

• Earth is almost twice the diameter of Mars.

• Nearly 70% of Earth's surface is liquid water, while Mars has none.
• The sun warms the Earth to more the 100oF; on Mars the temperature barely goes above the freezing mark.
• Earth has an atmosphere breathable by humans. Mars has virtually none, and it is composed almost entirely of toxic gases.
• IIRC, Mars is about 1 1/2 time farther from the sun than Earth; and is about 1/2 the size, and 3/4 the density.
• Its surface is largely iron oxide, which gives it its reddish color. There is no liquid water (there is ice at the poles). Because is it has a much thinner atmosphere, and is farther from the sun, it is much colder.
• Astronomers speculate that Mars was once much closer to the sun and was more "earthlike," but gradually moved farther away, resulting in its present state.

Answer 2

The environment on Mars differs from Earth in several key ways. Mars has a thin atmosphere that is mostly carbon dioxide, while Earth's atmosphere is thicker and contains oxygen. Mars has colder average temperatures and extreme temperature variations. Mars also lacks liquid water on its surface, unlike Earth which has abundant water in the form of oceans, rivers, and lakes.