Only Mercury, Venus, Earth and Mars have solid surfaces, as well as various moons. The other planets are all gas giants. Pluto would be solid, but is no longer regarded as a planet. The different planets and moons that have solid surfaces also have hills, valleys, mountains, craters and plains like Earth.
No. Mercury, Venus, Earth, and Mars have solid surfaces. Jupiter, Saturn, Uranus, and Neptune are made of gases. Note: Only what we can see of Jupiter, Saturn, Uranus and Neptune is made of gas. As planets get further away from our's it becomes harder to determine that. Some day we'll know. For example we're still learning much about the core of our planet. All elements have a different state of being, plasma, gas, liquid and solid. We know the Sun has a solid surface of ferrite.
Mars, it only has two moons, while there are thought to be at least 5 for Pluto.
Pluto is actually smaller than Mars. It is only about a third of its size.
Mars is larger than Pluto. Mars is the second-smallest major planet, the only smaller one being Mercury (which is also much larger than Pluto). (see related link)
Officially there are only 4 terrestrial major planets. They are Mercury, Venus, Earth, and Mars. All 5 dwarf planets are also solid: Ceres, Pluto, Haumea, Makemake, and Eris.
cube There are a great many solid shapes that have only flat surfaces.
A face is a flat surface. The only solid with no flat surfaces is a sphere.
The planet is Pluto
A cylinder
cylinder
There are 8 planets in the solar system, not just 3. They are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are 3 planets that are "Earth-like" in that they have gaseous atmospheres separate from their solid surfaces: Earth, Venus, and Mars. These planets display an array of atmospheric states: Venus has one that is very dense and hot, while Mars' is very cold and thin. Earth is the only one of the three atmospheres that is not almost entirely carbon dioxide.