1. Highest mountain   Mount Everest   Andes   Kanchenjunga   K2   Mount Rushmore   Hint Half-n-half Clue   2. Smallest continent   America   Australia   Europe   Africa   Asia   Half-n-half Clue   3. Widest waterfall   Boyoma Falls   Yosemite Falls   Niagara Falls   Grande Falls   Khône Falls   Half-n-half Clue   4. Deepest part of the ocean   Sea of Tranquility   Raasay Point   Java Trench   Bermuda Triangle   Marianas Trench   Half-n-half Clue   5. River with the greatest water flow   Zambezi   Nile   Mississippi-Missouri   Hwang Ho   Amazon   Half-n-half Clue   6. Longest river   Ob Irtysh   Hwang Ho   Mississippi-Missouri   Yangtze   Amazon   Half-n-half Clue   7. Brightest star as seen from the Earth   Orion   Dog Star (Sirius)   Rigel Kentaurus   Betelgeux   Eta Carinae   Half-n-half Clue