The outer planets are made mostly of gas which makes them Odenser than the gaseous inner planets.
O less dense than the gaseous inner planets.
Odenser than the solid inner planets.
less dense than the solid inner planets.

With these question would be nice i needs them in a hurry which nation leads eastern europe in nuclear energy usage? a ukraine b lithuania c slovakia d solvenia which eastern european nation is popular with skiers? a czech republic b estonia c bulgaria d none are