Earth
I'm pretty sure that it is made up of various gasses
Earth.
Earth is the planet that contains the most abundant amount of water, with about 71% of its surface covered in water. Other planets in our solar system, such as Mars and Venus, have negligible amounts of surface water in comparison.
In our solar system, Earth is the only planet with any significant amounts of surface water (and land).
The surface of earth is covered mostly by water.
Mars does have very small amounts of greenhouse gasses, but not enough to help warm the planet.
I'm pretty sure that it is made up of various gasses
the bigger it is the more gasses it needs which makes it hotter
Venus is a solid planet, only the surface is thick with gasses.
Yes. The greenhouse effect is caused by gasses that block thermal radiation from a planet's surface.
-- The product of the masses of the planet and the object on its surface; -- The distance between their centers of mass ... roughly the planet's radius.
Earth.
It consists of various gasses held close to the surface of the Earth by gravity. Since it consists of gasses it has no structure, but the weight of the upper (all relative) gasses press down on the lower gasses: compressing them. Thus the pressure increases as you get closer to the surface (actually the center of the planet).
Mars is viewed as the red planet because of the large amounts of iron oxide on the surface
depends on which planet.
Mars is the planet known as the red planet
Neptune is a Jovian planet. Which means it is a gas giant. It has no solid surface, just helium, hydrogen and methane gasses with ice particles and a very hot molten ammonia core. It appears blue because of the dim light reflecting off the methane gasses.