Mars only has a thin atmosphere, mainly of Carbon Dioxide. This is due to its relatively small mass, where the gravity is too low to sustain a large atmosphere. In addition, the absence of a magnetic field around the planet means that the solar wind can more easily strip any gas away from the planet.
Mars has a thin atmosphere, mainly of Carbon Dioxide. Its surface pressure is around 0.7 kPa, around 0.7% of Earths surface pressure.
Mercury has no atmosphere to speak of; Mars has less than 1% of Earth's and Venus has about 70 times Earth's.
I think it would be Mercury and Mars.
In this solar system, Mercury
It's Mars.
Mercury
The two alike rocky planets, Earth and Venus have sustainable atmospheres, due to size. Mars has an extremly thin atmosphere while surprisingly, mercury barley even has a notifiable one.
No. Mars has a rocky surface and a metallic core.
I would say Mercury and Mars, even though Mars does have an extremely thin atmosphere. Pluto doesn't have an atmosphere, but it also is no longer officially considered to be a planet.
Each of the four inner planets has an atmosphere, except Mercury. Mercury is too small and close to the sun for its gravity to sustain a proper atmosphere, although a tenius and unstable exosphere it thought to exist.
The two largest, Earth and Venus, have a mass large enough to sustain an extensive atmosphere. The other two rocky planets, Mars and Mercury, are too small to hold such an atmosphere. There is some, but it is very thin.
Mercury is the only planet (and inner planet) without an atmosphere - due to its small size. Mars has an atmosphere, but it is a thin one, mainly of carbon dioxide.
No. Mars has a rocky surface and a metallic core.
No. Only Venus has a really thick atmosphere. Mars has only a thin atmosphere and Mercury has almost no atmosphere.
Both Venus and Mars have atmospheres that are mostly carbon dioxide. However, Venus has a very thick atmosphere. The Martian atmosphere is very thin, so the answer is Mars.
The inner planets Mercury, Venus, Earth, Mars are are all relatively small, they are all rocky, they all have a relatively thin atmosphere.
A thin atmosphere is thin and a thick atmosphere is thick
A thin atmosphere is thin and a thick atmosphere is thick
I would say Mercury and Mars, even though Mars does have an extremely thin atmosphere. Pluto doesn't have an atmosphere, but it also is no longer officially considered to be a planet.
The temperature does not drop drastically on all planets, only planets with a thin atmosphere, such as Mars or Mercury. It is because the thick atmosphere traps the heat, and clouds are a bonus, like on Venus, because they trap much more heat than just a thick atmosphere. On a planet like Mars, which has a very thin atmosphere, it cannot hold on to very much heat in the night side, and a planet like Mercury cannot trap any heat and cannot be shielded from the heat for lack of a real atmosphere. That is the basic idea. =)
Each of the four inner planets has an atmosphere, except Mercury. Mercury is too small and close to the sun for its gravity to sustain a proper atmosphere, although a tenius and unstable exosphere it thought to exist.
The two largest, Earth and Venus, have a mass large enough to sustain an extensive atmosphere. The other two rocky planets, Mars and Mercury, are too small to hold such an atmosphere. There is some, but it is very thin.
Mercury is the only planet (and inner planet) without an atmosphere - due to its small size. Mars has an atmosphere, but it is a thin one, mainly of carbon dioxide.
Due to their large size and proportionately high gravity, the atmospheres of these planets are quite thick.