1. Which planet is known as "Earth's twin" or "Earth's sister" ?   Mercury   Neptune   Venus   Mars   Hint Half-n-half Clue   2. Which planet has the highest mountain and volcano in the entire solar system?   Pluto   Mars   Mercury   Earth   Half-n-half Clue   3. Which planet appears greenish in color and spins clockwise ?   Pluto   Saturn   Uranus   Neptune   Half-n-half Clue   4. Which planet is considered the twin of Uranus ?   Jupiter   Neptune   Saturn   Pluto   Half-n-half Clue   5. Which two planets rotate clockwise (east to west) on their axes ?   Venus and Uranus   Jupiter and Saturn   Neptune and Pluto   Earth and Mars   Half-n-half Clue   6. Which is the 'King of the Planets' ?   Earth   Mercury   Saturn   Jupiter   Half-n-half Clue   7. Which planet has an orbit around the Sun whose angle is steeper than that of other planets ?   Neptune   Pluto   Saturn   Uranus   Half-n-half Clue