Planet Surface

Match the items in the drop down on the right to those on the left. Click 'Check' to see your progress.

Craters and cracks, similar to the Moon.
Geologically young, evidence of volcanic structures.
71% Liquid water. Geologically active. Thin crust. Life exists.
Active weather system but geologically extinct. Thick crust. Indications of flowing water in the past.
Gas giants have no solid surface. Bands of clouds visible. Very thin ring system.
Gas giant. Extensive rings around planet.
Green gas giant. Few features visible. Dark ring system.
Blue Gas giant. Thin clouds, small storms visible. Very thin ring system.