1. Water quiz

2. 1. How much of the water on Earth is available for human use?
31% B.
13% C. 1% D. 2%

3. 2. How much of the Earth´s surface is covered by water?
75% B.
34% C.
55% D.
16%

4. 3. How much water does the human brain consist of?
50% B.
20% C.
75% D.
40%

5. 4. In which part of the world are the most polluted rivers?
Western Europe B.
Asia (China) C. US D.
Eastern Europe

6. 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

7. 6. What pollutes water? Pesticides and fertilizers Oils and plasticB.
Oils and plastic C.
Industrial and households´ wastewater D.
All of the above