Mysteries of water and life. the mysteries of Water and life, who really knows how it arose and the importance of it in life, so valuable for our development and that of all living beings.
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- 1 Water
- 2 Features
- 3 Properties of water
- 1 We can classify them in Physics and Chemistry
- 2 Chemical Properties
- 4 Natural state of water
- 5 Distribution of water on the planet
- 1 Seas and oceans
- 2 Atmosphere
- 6 Importance of water
- 7 External link
- 8 Sources
It is the vehicle of nature, it is one of the most mysterious and exclusive substances on Earth. Its nature goes beyond the knowledge of contemporary science. At first glance, water seems like a simple element, and was in fact long considered a pure element.
It was not until the 18th century that it was scientifically proven that water is not a simple element, but a compound of hydrogen and oxygen. As a result of this discovery, hydrogen received its name (from the Greek hydro = water and genes = what form).
Further research showed that the seemingly simple H20 formula describes a substance with unique structure and properties. The secrets of water have challenged scientists for more than two centuries. Even today, scholars are aware that the properties of water are unique and difficult to grasp, and are not governed by the physical laws that apply to all the other elements of the Universe. These are just some of the properties of this life-generating substance:
- The thermal capacity of water is 3,100 times higher than that of air and 4 times greater than that of a rock. Water regulates and maintains the temperature of the human body and allows us to save energy. The human body, two-thirds of which is made up of water, can maintain its normal temperature in conditions of stifling heat and severe cold thanks to the extraordinary ability of water to retain heat.
- Water is difficult to freeze and, once converted to ice, takes time to melt. Thanks to this property, the Earth’s climate is stable and temperate, and man can live and prosper in a pleasant environment.
- When water freezes, a sharp decrease in density of more than 8 percent occurs, while most substances become denser as they crystallize. For this reason, ice takes up more space than liquid water and does not sink. This change in density is unique to water and is crucial to all life on Earth. The ice that forms on the surface of water bodies acts as a floating mantle, preventing rivers and lakes from freezing completely and allowing underwater life. If ice were heavier than water, it would sink and all living things in rivers, lakes, seas and oceans would freeze and die. In time the Earth would become a frozen wasteland.
The unique properties of water and its role in the survival of all life forms on Earth have posed a constant challenge for scientists. The study of water has revealed new realities about the world around us. These new realities help us to better understand the properties of water and the peculiarities of its interaction with other substances .
We can classify them in Physics and Chemistry
Physical properties: It is a liquid, colorless, odorless and tasteless body. In large quantities it takes on a blue-green color. Its density is equal to 1 g / cm3 when determined at 40 ° C and at sea level. It boils at a temperature of 100 ° C at sea level. Its solidification point is 0 ° C (it forms ice). It has great solvent power, which is why they are called “universal solvent”.
It combines with metals and metals giving oxide. It combines with metal oxides and gives bases. It is combined with non-metallic oxides and oxyacid acids. It decomposes by electrolysis of hydrogen and oxygen . To decompose by another procedure, it needs temperatures above 27 ° C
Natural state of water
Water in nature is in three physical states: liquid and gaseous solid.
- Solid state.- It appears as snow, ice, hail, etc. Forming the snow-capped mountains and glaciers of the mountain range, that is, in the coldest areas of the earth, for example, the white mountain range of the department of Ancash, the snow-capped mountain of Coropuna in the region of Arequipa.
- Liquid state.- It is found in oceans, seas, lakes, lagoons, rivers and in the form of rain, etc.
- Gaseous state.- This state is found in the atmosphere as water vapor, in variable proportions forming the mists and clouds.
It is important to find that all natural waters, be they from rivers, wells, the sea, springs, etc., are impure because they contain dissolved substances, especially salts and gases, and also carry suspended substances.
Distribution of water on the planet
Seas and oceans
1.4 million km3
30 million km3
Rivers and lakes
2 million km3
Importance of water
Water is very important for the following reasons:
- It intervenes in the composition of living beings (up to 95% by weight).
- It constitutes the essential food for life.
- Intervenes in Photosynthesis.
- Dissolves nutritional substances to be transformed within the body
- It serves as an environment for a large number of organisms: fish, algae, etc.
- They act as a vehicle for transporting substances inside living things.
- It is a source of energy: “Water is white coal”.
- It has multiple applications in daily life.
- Serves as a means of communication for men: Mares, Lagos, Ríos