Question

explain what are three ways in which the outer planets are similar?

Explanation:

The outer planets (Jupiter, Saturn, Uranus, Neptune) are gas - giants. They have thick atmospheres mainly of hydrogen and helium. They also have many moons and ring systems.

Answer:

1. They are gas - giants.
2. Their atmospheres mainly consist of hydrogen and helium.
3. They have numerous moons and ring systems.