1. Largest desert   Atacama Desert   Sahara Desert   Gobi Desert   Kalahari Desert   Chihuahuan Desert   Hint Half-n-half Clue   2. Hottest planet of our solar system   Earth   Jupiter   Mercury   Mars   Venus   Half-n-half Clue   3. Greatest waterfall (in terms of flow rate)   Boyoma (formerly Stanley) Falls   Khône Falls   Grande Falls   Yosemite Falls   Niagara Falls   Half-n-half Clue   4. Coldest planet of our solar system   Venus   Neptune   Ganymede   Saturn   Pluto   Half-n-half Clue   5. Heaviest satellite (natural) of our solar system   Deimos   Phobos   Sinope   Ganymede   Moon   Half-n-half Clue   6. Highest mountain   Mount Everest   K2   Mount Rushmore   Kanchenjunga   Andes   Half-n-half Clue   7. Largest satellite (natural) of our solar system   Deimos   Moon   Ganymede   Sinope   Phobos   Half-n-half Clue