Written by Administrator
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Tuesday, 04 September 2012 23:00 |
- The water are condenses in the atmosphere to clouds form .
- Every day on the earth falling about 300 cubic kilometers of water.
- The water through precipitation falls to earth one part goes to the underground.
- There are about 1.4 billion cubic kilometers of water on the Earth .
- 97% of the water quantity on the Earth is salt water (seas and oceans) and only 3% of water quantita is fresh water (rivers, lakes, polar ice and groundwater).
- Every day about 100 cubic kilometers of water flows go into the seas and oceans.
- Water in seas and oceans comes from rivers, glaciers to melt and from underground.
- Water from the ocean and soil changes physical state and enters the atmosphere as a gas (water vapor).
- Evaporation are increases with temperature and wind speed.
- Water in the atmosphere are condenses again in the form of clouds.
- This process is continuous and is called the water cycle.
- During this process, there is no loss of water, or the amount of water on the planet earth and its atmosphere is always the same.
![kruzenje](/images/kruzenje.jpg)
All the above shows that the system of the water cycle works perfectly until the moment when it comes to human interference. Since mostly everything what man do lead to a reduction in the quantity of drinking water, below will be explain methods for "saving" and "storage" of water.
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Last Updated on Wednesday, 12 September 2012 12:29 |