Definition of the Child – Article 1 and 2 – (2-2)
Homo sapiens is the term commonly used to refer to the human race, which includes man, woman and...
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Water is a precious resource, in fact, contrary to appearances, this resource that is so precious to man is very rare. Let’s find out together about this vital and much coveted resource, water.
70% of the surface of our planet is covered in water, but take note, 97% of this water is salty, which means that the amount of fresh water only constitutes a paltry 3 percent, of which 2% is ice (the Poles, glaciers, etc…).
There is therefore only one percent available for human consumption or irrigation (The watering of crops furthermore uses up 2 thirds of this fresh water), so it is absolutely necessary to preserve this resource, which should become the inalienable property of all.
What is water?
Water is a molecule formed from one atom of oxygen (O) combined with two atoms of hydrogen (H for Hydrogen and 2 for two atoms = H2), in chemical language water is known as H2O, but it also has other names such as hydrogen oxide or even hydroxic acid.
In terms of temperature, water molecules have greater or lesser activity, the lower the temperature, the lesser the movement (Until it changes into ice), on the other hand, the higher the temperature, the greater the movement (It’s almost steam in this state).
Water in all its states: liquid, gas and solid!
Water is in a liquid state when the atmospheric pressure temperature (Sea level) is “normal”.
When the temperature of water in its liquid state is reduced, the movement of the molecules slows down so that little by little they become hard and change into ice. At normal atmospheric pressure, ice is formed at less than 0 degrees Celsius.
The gaseous state of water is called steam, it is produced when water is heated up and the temperature is very high. To get water in a gaseous state (at normal atmospheric pressure), a temperature equal to or higher than 100 degrees Celsius is necessary. When heated up, the molecules move very fast, so that the steam takes up all the space that is available. As with any other gas, one can say that it is expansible. On the other hand, it is also possible to reduce the amount of space and compress steam.
Water, indispensable for life:
Water has many possible uses, hygiene, food or water consumption; we therefore talk of potable water, table water, mineral water, tap water and gaseous water. This is the best drink of all for animals and man, whose body consists of 70% water. You cannot live without water, it is very important to be properly hydrated so as to allow your body to function properly. It is therefore recommended that water should be drunk regularly (Water and not sugary liquids) because you cannot live and carry out normal activities for more than 3 days without water.
In short, water is indispensable for the existence of all living beings, animal or vegetable.
Who does water belong to?
Water is very precious, it is a common asset of all the inhabitants of the earth, because of its unequal distribution at the beginning of this third millennium, hundreds of millions of people have to walk for hours to get it (WHO 2004) and more than 2 billion of our contemporaries do not have direct access to clean water (On this subject, see the episode on water tables linked to world water day on 19 March),
This natural resource is not renewable, this 1% of fresh water available must be shared between billions of human beings! It is therefore a matter of good sense that to survive in the literal sense of the term, we do not have the right to pollute or waste this paltry one percent that we have.
This one percent, constituting water sources, rivers and lakes, must be used in a reasonable manner, that is, by carrying out measured assessments preserving the resource for all human beings, not forgetting future generations.
Reasonable agricultural activity is also indispensable because, as we have seen, irrigation already takes up 2 thirds of the available fresh water. Agriculture can and should be in harmony with the needs of the population and what nature can provide, a reasonable approach will optimistically enable us to feed everyone without destroying the planet (See also episode no. 51, CyberDodo and pesticides, on the dangers of unreasonable agricultural activities).
As individuals, we can all contribute to conservation of the resource by making sure that water is not left to run without being used, using water savers on taps and sanitary installations, repairing all leaks or all weak joints and complying with restrictions on watering gardens or washing cars.
Each human being lives for the first 9 months of life in an exclusively liquid environment, we therefore all know intuitively that water is one of the most precious assets we possess.
Respect it, preserve it, it’s a question of survival!
To find out more about the subject:
To see the cartoon on water, click here
To see the quiz on water, click here
To see the cartoon on camels, click here
To see the file on camels, click here
To see the quiz on camels, click here
To see the cartoon on dams, click here
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