How many percent of water does the human body consist of?

• around 60%

• around 20%

• around 80%

• around 5%

What is the daily need of water for a human body?

• 2-3l

• 6l

• 1-2l

• 0,5l

What is the sum formula of water?

• H2O

• H3PO4

• HNO3

• HO2

What is the density of water at 4 degrees Celsius?

• 1 g/cm3

• 50 g/cm3

• 0.1 g/cm3

• 100 g/cm3

How much of the Earth's surface is water?

• 40%

• 70%

• 10%

• 95%

What's another name for water?

• dihydrogen monoxide

• aqua oxygen

• aquarium dihydrogen

• monohydrate oxygen

How much water is in your blood?

• 80%

• 20%

• 10%

• 50%

How deep is the deepest trench on Earth?

• -10 994m

• -5 562m

• -8 023m

• -20 052m

How fast does sound travel in water?

• 1.480 m/s

• 2.238 m/s

• 50 m/s

• 1 m/s

What's the longest river in Europe?

• the Volga River

• the Danube River

• the Ural River

• the Dnieper River