What is water?
Since school years we know that without water no life is possible on our planet. Without it no man can live even weeks. However, there was a time when people not only didn’t know what water is, but didn’t realize how much of this substance on Earth.
What is water
The water is called liquid, has no taste, colour or smell. This substance is one of the most common on Earth. Approximately ¾ of the planet’s surface is rivers, seas, oceans and other water bodies. Water can be solid (ice) and gaseous state.
The body of an adult about 70% of it. It is a solvent of mineral nutrients in our body, contributes to the normalization of normal body temperature and removes waste products together with toxins. As the water is just indispensable in our diet. Doctors say that a person should drink 1.5 to 2.5 litres of clean water.
Scientists estimate the Earth is about 1,500 million cubic kilometres of water, and only 10% of it is freshwater and suitable for drinking. All of it is divided into surface water and groundwater.
Water, located on the shallow depths people use for their needs. Huge reserves of fresh water are glaciers of Antarctica. Not a small role for atmospheric precipitation. In the same way people have learned to get fresh water from the oceans, through the application of chemical and physical methods.
About 6,000 cubic kilometers of water located in different living organisms. Our body also regularly exchanges with the environment. This occurs during breathing, through urine and sweat. If the body stands out more fluid than goes in, then dehydrated, which can lead to death. Its symptoms are dizziness, shortness of breath and palpitations.
Every cell in our body contains water. All biochemical reactions that occur in it, require its presence. If the body is not enough water in the cells is the accumulation of metabolic products, which leads to the development of serious ailments. To avoid this, one must observe the drinking regime. Water is involved in:
- transport oxygen and nutrients to tissues and cells;
- the regulation of blood pressure;
- support of the process of hematopoiesis;
- the removal of toxins;
- lubrication of the joints;
- the normalization of the heat exchange.
Interesting facts about water
Scientists do not stop to examine the water regularly finding new properties:
- The average amount contained in all living organisms water is at least 50%.
- The mantle holds ten times more liquid than is contained in the oceans.
- If the Earth did not have depressions and bulges, the water level would rise to 3 km over land.
- Oceans occupy 71% of our planet’s surface and contains 97% of all the world’s water.
- If the glaciers that are on the planet, melted, 1/8 of the land would be flooded.
- Known cases when fresh water was freezing at temperatures above 0 degrees.
- Sea water is 35% salt, so its solidification occurs at a temperature below -2 degrees.
- The water surface can display about 5% of sunlight, while as from the ice surface more than 85%.
- Water is one of the few substances that expands when it freezes.
- In combination with fluoride water and its vapor is capable of burning. With a significant concentration of fluorine, the mixture becomes explosive.