Final Answer:
The given statement "Only one of the moons of the jovian planets has an atmosphere thicker than Earthʹs atmosphere." is true.
Explanation:
The jovian planets, also known as gas giants, are composed mainly of hydrogen and helium. They are much larger than Earth, and their gravity is much greater. This means that the escape velocity, or the velocity required for a particle to escape the gravitational pull of a planet, is much higher than Earth's escape velocity. As a result, the moons of the jovian planets are able to hold onto their atmospheres much better than Earth's moon can.
One of the moons of the jovian planets, Titan, has an atmosphere that is thicker than Earth's atmosphere. Titan's atmosphere is composed of nitrogen, methane, and other hydrocarbons, and its atmosphere is about 1.5 times as thick as Earth's. Additionally, the pressure at the surface of Titan is about 1.5 times greater than the pressure at Earth's surface. This means that the atmosphere on Titan is much denser than the atmosphere on Earth.
The other moons of the jovian planets have atmospheres that are much thinner than Titan's and much thinner than Earth's atmosphere. For example, the atmosphere of Europa, a moon of Jupiter, is composed mainly of oxygen and is about 10,000 times less dense than Earth's atmosphere. Additionally, the atmosphere of Ganymede, another moon of Jupiter, is composed mainly of oxygen and is about 10 trillion times less dense than Earth's atmosphere.
In conclusion, only one of the moons of the jovian planets has an atmosphere thicker than Earth's atmosphere. This moon is Titan, which orbits Saturn and has an atmosphere composed of nitrogen, methane, and other hydrocarbons, and is about 1.5 times as thick as Earth's atmosphere.