Water quiz
1. How much of the water on Earth is available for human use? 31% B. 13% C. 1% D. 2% 14.5.2019
2. How much of the Earth´s surface is covered by water? 75% B. 34% C. 55% D. 16% 14.5.2019
3. How much water does the human brain consist of? 50% B. 20% C. 75% D. 40% 14.5.2019
4. In which part of the world are the most polluted rivers? Western Europe B. Asia (China) C. US D. Eastern Europe 14.5.2019
5. Most of the pure, drinkable water of the Earth is in form of: Icebergs B. Vapor and clouds C. Spring and river water D. Water in the oceans 14.5.2019
6. What pollutes water? Pesticides and fertilizers Oils and plastic B. Oils and plastic C. Industrial and households´ wastewater D. All of the above 14.5.2019