| ____ has an atmosphere of 78% nitrogen and 21% oxygen. |
1. Mercury |
| ____ is the largest planet. Ganymede is its largest moon. |
2. Venus |
| ____ is the hottest planet due to a runaway greenhouse effect. |
3. Earth |
| ____ was the first planet discovered using a telescope (1781). |
4. Mars |
| ____ appears red due to the iron oxide dust on its surface. |
5. Jupiter |
| ____ is the smallest planet and the closest to the Sun. |
6. Saturn |
| ____ is the windiest planet. Triton is its largest moon. |
7. Uranus |
| ____ has spectacular rings and is less dense than water. |
8. Neptune |
