Why water is the source of life, why water is the source of life

It's very simple: go to the junior high school textbook and look it up!

1. Why is water the source of life? Answer: 75% of the human body is water, and 75% of the earth's surface is water, is this a coincidence in the universe?

The people take food as the sky, and food and drink as the first. Eating and drinking, "drinking" first and then "eating". Water is a macronutrient, and no other nutrient is as widely involved in human body functions as water.

Every organ of the human body is extremely rich in water, 83% of the blood and kidneys, 80% of the heart, 76% of the muscles, 75% of the brain, 68% of the liver, and 22% of the bones. Life is made up of cells, and cells must be "soaked in water" to survive. Dryness is the main manifestation of aging.

Young people account for 42% of intracellular water, while older people account for only 33%, resulting in wrinkles and gradual shrinkage of subcutaneous tissues. The process of aging is the process of losing moisture. People can go without meals for a few days, but they can't go a day without drinking water, and if the human body loses 15%-20% of its body weight, its physiological functions will stop, and then it will die.

2. What is the specific gravity of human water content? A: As we all know, the human body is close to 70% water.

That is, if a person weighs 60 kilograms, the water accounts for more than 40 kilograms. In the case of infants, it is more than 80%, and the proportion of fetal fluid that is still in the mother's body is even higher. The water content of the elderly is only 50%-60%.

3. What are the special properties of water? A: Water has many special properties that have attracted people's attention in recent years.

For example, water increases in volume when it freezes; The water in the capillary or the water in the organism, which is also known as interstitial water, can be -110 without freezing; The molecular formula of water is H2O, the molecular weight is only 18, but it exists in a liquid state at room temperature. 4. Is the water you drink safe?

Answer: 1) Tap water is obtained by the water plant after treating the water in rivers, rivers and lakes. At present, China generally adopts the method of water plant treatment, centralized water supply, and then transportation to residents' homes through tap water pipelines to supply drinking water.

For high-rise buildings, the method of secondary pressurized water supply of high-rise water tanks is adopted. However, the pollution of water sources caused by industrial development is becoming more and more serious, and due to the limitations of technology, technology, economy and other conditions, waterworks are powerless to do anything about some pollution. At present, a certain amount of chlorine (bleaching powder) is used in the disinfection process of tap water, which causes chlorine residue in the water and reacts with organic matter in the water to form chloroform.

It is known that chloroform is the main carcinogen in tap water, and in the cold water state, chloroform is mostly within the specified range, but the content of chloroform in tap water rises sharply after heating, especially at 95 to 100, and the residue is reduced after boiling for more than five minutes. In addition to chemical pollution, secondary pollution of tap water is also serious due to pipeline corrosion, insoluble calcium in water, organic matter and water storage tanks in high-rise buildings. 2) Boiling water is stagnant water.

a.Liquid water is a good solvent for disassembly.

b.Water scarcity can be directly involved in a variety of metabolic processes.

c.Water can only be indirectly involved in metabolic processes.

d.Gaseous water is a good solvent.

Correct Fu Stupid Liang Answer: ab

Why is the water stove the source of life?

a.Water is directly involved in a variety of metabolic processes.

b.Gaseous water is not a good solvent.

c.Liquid water is a great solvent.

d.Water can only be indirectly involved in metabolic processes.

Correct answer: ac

This point of view is not right, because water must exist on this earth, because if there is no water, living things cannot live, and if you don't cherish water now, the last drop of water on the earth in the future will be your tears.

1. A drop of clear water, a green space, and a earth.

2. To be kind to dust and water is to be kind to life.

3. The pillars of the country are indispensable, and the water of life cannot be withered.

4. It is the common responsibility of the whole society to save water and protect water resources.

5. Pay equal attention to open source and throttling, give priority to throttling, focus on pollution control, scientific open source, and comprehensive utilization.

6. The state implements planned water use and strictly saves water.

7. Brother Yan cherishes water, loves water, and saves water, starting from me.

8. A drop of clear water, a piece of green space, and a piece of earth.

9. To be kind to water is to be kind to life.

10. The pillars of the country are indispensable, and the water of life cannot be withered.

11. It is the common responsibility of the whole society to save water and protect the source of water resources.

12. Pay equal attention to open source and throttling, give priority to throttling, focus on pollution control, scientific open source, and comprehensive utilization.

13. The state implements planned water use and strictly conserves water.

Water is a necessary substance for the human body to maintain basic life activities, and human needs for water are second only to oxygen. Water is the constituent component of the human body, and among all the components of the human body, it has the largest amount of water, accounting for about 2 3 of body weight. If a person skips meals for a short period of time, as long as he can drink water, even if he loses 40 years of weight, he will not die.

However, if you can't drink water for a few days, the body will lose more than 6 water, and you will feel weak and anuria; If you lose up to 20 water, you will die. Therefore, water is the source of life and one of the seven essential nutrients for human beings.

Water is indispensable in our lives, everything is inseparable from water, and if we humans lack water, we will not be able to continue to live. So it is the foundation of our life, of course, it is not omnipotent, and it will bring us a lot of good and bad.

There are so many good places because we can't live without water every day. The body should consume 1500 ml of water every day. Laundry and cooking of life, diet, and living.

Watering grain, vegetables and all kinds of crops. Our electricity and other aspects are inseparable from water, so with water, our lives will become more stable. The sea, the lake add a lot of beauty to nature.

What is not good for us, for example, when there is a heavy rain that causes the flood disaster of the bridge bureau, it has a great impact on us. It's easy to take a very big hit to our living environment. But there is no way to avoid this, so we need to save water in our lives.

Water is the source of life, without water, there is no life, without water, the earth will no longer be vibrant, but dead. In many parts of the world, there is a serious problem of water scarcity!

Many people cherish every drop of water very much because they understand the pain of not having water to drink. We all feel thirsty, it's not pleasant, and don't you feel more sorry for those who don't have water to drink all day long? Cherish water resources, every drop is a life!

Related Notes:

Water conservation, also known as water conservation. It refers to strengthening water management through administrative, technical, economic and other management means, adjusting the structure of water use, improving water use methods, scientific, reasonable, planned and focused water use, improving the utilization rate of water, and avoiding the waste of water resources. In particular, it is necessary to do a good job of propaganda among the whole people, and make use of activities such as the World Water Day to educate everyone to use water scientifically in their daily work or life, consciously save water, and achieve water conservation, which is everyone's responsibility.

Saving water should start from a little bit, it seems to be a drop of water, but the knowledge there is very deep.

China is a water-scarce country, and in daily life, as soon as we turn the faucet, water will flow out continuously, and we may not feel the water crisis at all. But the reality is that the water we depend on for survival is becoming increasingly scarce. More than 1 billion people in the world still lack access to clean water, so 3.1 million people die every year from drinking unclean water.

In April 2019, the National Development and Reform Commission and the Ministry of Water Resources jointly issued the National Water Conservation Action Plan.

The above content reference: Encyclopedia - Water Conservation.