Meşkure Şamlı Ortaokulu - Şebnem Gençtürk
WORLD WATER DAY Water is a source of life. For example, water is needed in all functions that take place in the human body (such as digestion, circulation, breathing, emptying, reproduction). Therefore, the presence of liquid water is being investigated in the search for life outside the Earth. From space, our planet appears as a blue sphere. That's because about 71% of its surface is covered with water. Liquid water is the most important substance that separates the Earth from other planets in the solar system. Geological evidence suggests that liquid water has existed on Earth for 3.8 billion years . Usually there are large differences between the melting and boiling temperatures of a substance. However, water can be found in solid, liquid and gaseering at a relatively narrow temperature range. And is the water the source of life as much as we think on our planet? There's water on Earth, equal to the volum...

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