How many percent of world’s surface is covered by water?

• 70%
• 71%
• 65%
• 75%

Admixture of salt doesn’t contain…

• mineral water
• water from your sink
• distillated water
• drinkable water

Living creature contain…

• 50% of water
• 70-90% of water
• 75% of water
• 65% of water

From the whole amount of water on the surface of the Earth, there are … % of fresh water.

• 1.5
• 0.3
• 2.5
• 0.5

During the day one person has to drink…

• 3l of water
• 30 ml of water on each kg from his/her weight
• 1.5 l of water
• 1 l of water

Water is…

• alive
• dead
• unknown
• life- maintaining

The saltiest water on the Earth is…

• in the Dead sea
• in the Baltic sea
• in the lake Assal
• in the Pond of Don Juan in Antarctic

20% of the world’s fresh water are located …

• in the Amazon river
• in the lakes
• in the lake Baikal
• in the rivers

The longest river in Europa is…

• the Volga
• the Danube
• the Elbe
• the Thames

In which from Baltic sea region countries is located the widest waterfall?

• Estonia
• Lithaunia
• Latvia
• Finland