a) Characteristics of earth as a supporting planet of life
A habitable planet must have specific features for sustaining life, including a stable atmosphere and breathable gases
Earth has liquid water on its surface
Approximately 71% of Earth’s surface is covered in water. All of that makes up about 96% of all the water on the planet. The rest is divided between air vapor, ice caps, glaciers, and moisture in the soil
Earth is the only planet with continents
Continents are large, continuous masses of land that sit on top of plate tectonics and “float” on the planet’s mantle. Earth is the only planet in the Solar system that has continents.
Earth is the only planet with just one Moon
First, the planets that are closer to their stars can’t capture moons because the gravitational pull is too strong and takes them out of their orbits.
Earth’s atmosphere is very different from the other planets’
The atmosphere is an outer layer of gas that planets have that is located between the planet and space. On Earth and other rocky planets, the atmosphere sits on top of the surface, and it is what contains the air we breathe.
One of the characteristics that make Earth so unique when compared to the other planets is the composition of its atmosphere. Most planet’s atmosphere is mostly made up of hydrogen or carbon dioxide.
Earth’s temperature is stable
While other planets have seen extreme changes in their temperatures, Earth’s has remained more or less stable for most of its lifespan. It is believed that both Venus and Mars had the necessary temperature conditions to support liquid water on their surfaces too.
Distance from the sun.
Earth is the third from the sun which make it habitable because it is neither hot nor cold.
Availability of ozone layer.
Presence of ozone layer also contributes to supporting of life as it helps in absorbing of ultraviolet rays which prevents skin cancer
below are differences between earth and mars
Size between mars and earth
If you compare its diameter with Earth’s, Mars is almost half the size of our planet.
The position
the earth takes the third position while mars take the fourth position
Gravity
mars have a gravity of about 3.72 while earth has about 9.81.
Temperature
mars has a temperature of about -62 degrees while earth has about 15 degrees
Atmosphere
mars is composed of thin layer composed of carbon dioxide while earth is composed of rich atmosphere conducive for human life.
Water
mars have no water while earth has abundant
Distance from the sun
Mars is approximately142 million miles from the sun while earth is 93 million miles away
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Hae Nancy you have a wonderful conclusion mostly where you are dealing with our beautiful planet earth. I am interested by the information that Earth’s atmosphere is very different from the other planets’.
Hello Nancy your post is really interesting as it highlights the characteristics of a habitable planet.Moreover,it explains the difference between the atmosphere of the earth and that of another planet it’s so fantastic.