Question

choose the 3 correct statements about the outer planets
have rings
contain lots of hydrogen and helium gases
have shorter days (faster rotations)
are more dense with rocky surfaces
have longer days (slower rotation)
are relatively small in size

Explanation:

The outer planets (Jupiter, Saturn, Uranus, Neptune) are gas - giants. They have rings (Saturn's are most famous, but others have them too), are composed mainly of hydrogen and helium gases, and have shorter days due to fast rotations. They are not dense with rocky surfaces (unlike inner planets), are large in size, and do not have longer days.

Answer:

1. Have rings
2. Contain lots of Hydrogen and Helium gases
3. Have shorter days (faster rotations)