Jupiter, Saturn, Uranus, and Neptune
Inner planets are mostly rock and outer planets are mostly gas.
Nptune is made mostly out of gas
No, those are the outer planets.
These are the four outer gas giant planets; Jupiter, Saturn, Uranus and Neptune.
because they are made of mostly metal and rock while the bigger planets are mostly made of gas
They consist mostly of gas.
The four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars. The four outer gas giant planets are Jupiter, Saturn, Uranus and Neptune.
Because they are mostly made out of gas and they are big or giant
Some are (the gas giants), but the others, like Earth, are not.
The atmosphere of the gas giants is usually made up of mostly of hydrogen and what?
None known; half the planets are mostly solid, the other half are mostly gas.
The four outermost planets (Jupiter, Saturn, Uranus, Neptune) are mostly made of hydrogen and helium gas, with smaller amounts of other elements like water, ammonia, and methane. These planets are known as gas giants because of their composition and lack of a solid surface.