1. Planet with most-tilted axis that seems to spin on its side   Neptune   Uranus   Jupiter   Saturn   Hint Half-n-half Clue   2. Least dense planet of our solar system   Earth   Saturn   Jupiter   Pluto   Half-n-half Clue   3. Largest planet of our solar system   Saturn   Jupiter   Neptune   Uranus   Half-n-half Clue   4. Smallest planet of our solar system   Mars   Venus   Mercury   Pluto   Half-n-half Clue   5. Planet, besides Jupiter, that has storms as revealed by dark spots   Pluto   Saturn   Neptune   Uranus   Half-n-half Clue   6. Planet with fastest orbiting speed around the Sun   Pluto   Jupiter   Earth   Mercury   Half-n-half Clue   7. Most dense planet of our solar system   Saturn   Pluto   Earth   Jupiter   Half-n-half Clue