What is the role of water in the nature?

Hypothesis:
We count , that remarkable substance water , it is necessary for a life of the ground and on the ground.
The purposes and problems:
To systematize representations about distribution of water on the ground.
To find out value of water for plants , animal , the person.
To open principal causes and consequences of pollution water.

Kind from space.
On the globe and a card our planet.
Water is blue: oceans, seas, rivers.

Waters of reservoirs.
Rivers
oceans
Seas
Lakes

Water , water – circle water…
On the ground – 3/4
In plants - 4/5
In the person–3/4

There is no end to its various transformations: the she a dewdrop, a sparkling snowflake, transparent ice.

Consequences of activity of the person

Pollution of reservoirs

The Caucasian mineral waters.

Mineral source