1. Longest river   Amazon   Hwang Ho   Mississippi-Missouri   Ob Irtysh   Yangtze   Hint Half-n-half Clue   2. Satellite closest to the parent planet   Phobos   Moon   Titan   Enceladus   Charon   Half-n-half Clue   3. Largest sea   Dead Sea   Black Sea   Red Sea   South China Sea   Mediterranean Sea   Half-n-half Clue   4. Largest star   Betelgeuse (Alpha Orionis)   Orion   Sun   Pole Star   Sirius   Half-n-half Clue   5. Largest peninsula   Arabia   Russia   China   France   India   Half-n-half Clue   6. Highest mountain   Mount Rushmore   Mount Everest   Kanchenjunga   Andes   K2   Half-n-half Clue   7. Largest planet of our solar system   Jupiter   Uranus   Saturn   Neptune   Pluto   Half-n-half Clue