Earth Science: All About Water This kahoot explores the structure of water molecules and how water is used on Earth. 15 Questions by Science_by_Kahoot 01/19/2018 answers Play About how much of the Earth's surface is made up of water? 65% 68% 71% 77% Approximately how much of Earth's water is fresh, drinkable water? 3% 15% 20% 28% How much of the Earth's 3% of fresh water is frozen and unavailable for drinking or crops? 33% 49% 57% 75% … and 12 more awesome questions! Check them out by clicking “Play”.