Question

which phrase best describes the outer planets?
rocky with few moons
gaseous with slow rotations
dense with few moons
gaseous with low density

Explanation:

The outer planets (Jupiter, Saturn, Uranus, Neptune) are gas giants. They are composed mainly of hydrogen and helium (gaseous). Due to their large size and gaseous composition, their density is relatively low compared to the inner rocky planets.

• "Rocky with few moons": Inner planets (Mercury, Venus, Earth, Mars) are rocky. Outer planets have many moons.
• "Gaseous with slow rotations": Outer planets have fast rotations.
• "Dense with few moons": Incorrect as outer planets are not dense (low - density) and have many moons.

Answer:

gaseous with low density