1. Which planet has the highest mountain and volcano in the entire solar system?   Earth   Mercury   Mars   Pluto   Hint Half-n-half Clue   2. Which is the second largest planet and has rings around it ?   Uranus   Saturn   Jupiter   Neptune   Half-n-half Clue   3. Which two planets rotate clockwise (east to west) on their axes ?   Neptune and Pluto   Jupiter and Saturn   Venus and Uranus   Earth and Mars   Half-n-half Clue   4. Which planet appears greenish in color and spins clockwise ?   Neptune   Saturn   Pluto   Uranus   Half-n-half Clue   5. Which planet is known as "Earth's twin" or "Earth's sister" ?   Venus   Mars   Mercury   Neptune   Half-n-half Clue   6. Which planet is considered the twin of Uranus ?   Pluto   Saturn   Jupiter   Neptune   Half-n-half Clue   7. Which of the following is not an 'Inner Planet' ?   Venus   Mercury   Jupiter   Mars   Half-n-half Clue