How do you perceive changes in nature? Why the natural world is developing

Matter in nature is changing from moment to moment. Since humans learned to create and use tools, the natural world has changed more rapidly and widely. Almost everything we use today has gone from a primitive state of uselessness or little usefulness to a completely different and useful state.

The table is made of wood; The teacups are fired from china clay; Paper is made of bamboo, wood, linen, and grass......

In the eyes of chemists, the various changes that occur in matter in nature can be divided into two categories. One is when the composition, properties, and characteristics of a substance are changed when it changes, which is called chemical change. For example, green leaves turn yellow; oxygen and hydrogenated synthetic water; Iron rusts; Copper is dissolved in nitric acid; Gasoline is burned inside the engine of the car; iron is made from iron ore; Ammonia is broken down into hydrogen and nitrogen, among others.

The other type is that it does not produce new substances in the process of change, but only changes its physical properties, which is called physical change. For example, water in the air evaporates and forms rain, snow, and hail; Salt is crystallized from seawater; turning wood into furniture; Iron melting, etc.

Every chemical change produces one (or more) new substances, some of which we need, some of which we do not need, and even harmful. For example, to extract metals from ores, various metals can be reprocessed into metal products; Various olefin organic compounds can be obtained from cracking and then made into thousands of chemicals such as plastics, synthetic fibers, drugs and synthetic rubber through various chemical reactions, which greatly enrich our lives.

However, the environmental pollution brought about by every chemical change is also worrying, especially the environmental pollution that people are concerned about. For example, the combustion of coal produces carbon dioxide and sulfur dioxide, and the combustion of gasoline produces carbon monoxide and nitrogen oxides, which enter the atmosphere. There are also piles of pesticide residues, fertilizer losses to rivers, household waste, industrial waste, etc.

It can be seen that while human beings are applying chemical changes to their own benefit, they are hiding the root cause of the evil. However, the study of chemistry can control chemical changes more effectively and produce more wealth for the benefit of mankind and reduce harmful by-products or waste.

1.This grassland is very lush, there are a lot of sheep and wolves, but because of the relationship between wolves, the nearby residents are very frightened, so some people propose to eliminate all the wolves, after the wolves are eliminated, the sheep have no natural enemies to reproduce rapidly, as a result, more and more sheep appear on the grassland, gradually the grass is no longer lush, a large number of sheep are starved to death, and later someone proposed to release the wolves back into the grassland to maintain the ecological balance of the grassland, the wolf came, the number of sheep was finally controlled, and the grass began to become abundant. 2.

Due to the use of pesticides by humans, a large number of insects have died, and the birds living in the woods cannot find food, and they have gradually decreased, and the decrease in birds has led to an increase in insects, and humans have to use more powerful pesticides to exterminate insects.

The universe is material, matter is in motion, there is only relative motion, there is no absolute rest, so nature is developing.

The natural world in the narrow sense refers to the material world that is different from human society, that is, the inorganic world and the organic world studied by natural science. The natural world in a broad sense refers to the entire objective material world, including human society. This material world exists and changes in a natural way.

Human consciousness is also the product of the material world in a natural way, and human consciousness is the highest product of the development of nature. The physical world is systematic, complex, and infinitely diverse. It includes both the material world known to mankind and the material world unknown to mankind.

Nature is a space body that accommodates various media, and different media are transformed into each other under various conditions, sometimes layered, sometimes miscible with each other.

There is a close relationship between human perception of nature and ecological changes. The understanding of human beings is constantly changing and deepening with the progress of the times and science and technology, and the improvement and change of human cognition of nature has also led to the change and evolution of the environment and ecosystem.

In the early days of the Shipta period, human understanding of nature was mainly based on the need to survive and be safe, to constantly seek food and avoid natural disasters. However, with the development of society and the progress of science and technology, human beings have gradually mastered more in-depth knowledge of natural sciences and deepened their understanding of the laws of nature. This change has also led to the evolution of the environment and ecosystems, such as the massive use of fossil energy, over-exploitation of land, and unreasonable urbanization planning, which have had a serious negative impact on the ecological environment.

With the improvement of human cognition and the continuous seriousness of ecological problems, we are constantly reflecting on and adjusting our cognition and behavior. For example, the first department and scientific and technological workers are committed to researching and responding to environmental problems, implementing sustainable development strategies, strengthening environmental protection, and so on. Personally, we should pay more attention to environmental protection, reduce waste, promote low-carbon lifestyles, and so on.

Therefore, the relationship between the change of human understanding of nature and ecological change needs to be viewed as a whole, and we need to constantly explore and adjust our understanding of the laws of nature to better protect our environment and ecosystem.

In ancient society, nature was the master of human beings, people deified nature, worshiped nature, believed that the mountain had a mountain god, the river had a river god, and the drought begged the dragon king for rain, and asked the god for blessing in case of trouble.

In modern times, with the progress of science and technology and the development of the industrial revolution, the ability and level of human beings to transform nature have been continuously improved. Machines roar across fields, satellites roam space, and people believe that nature is the object of human conquest and that people can dominate it.

However, with the expansion of human activities, land desertification, the hole in the ozone layer, floods, and the decline of species are seriously threatening the survival of human beings.

People re-examine the relationship between man and nature, realize that nature is a friend of human beings, and that man and nature should live in harmony, emphasizing the protection of the environment and the principle of sustainable development.

This shows that the existence and development of Qiaoling in nature is objective, it exists before man and man's consciousness, and does not depend on man's will and filial piety, and recognizes that the objectivity of nature is the basic premise for dealing with the relationship between man and nature.

Human beings have the subjective initiative to understand and transform nature and make it available to people, but human activities cannot violate the laws of nature, otherwise they will be punished by nature, as evidenced by environmental damage, ecological crises and other serious threats to the survival of human beings.

Therefore, we must correctly handle the relationship between initiative and objective law, emphasize the harmonious coexistence of man and nature, and take the road of sustainable development.

The grass is green and yellow, yellow and green, and the scenery of nature is new every day. In spring, the tree sprouts green shoots and is full of life; In summer, the branches are lush and prosperous; Autumn, the harvest season, is fruitful; In winter, the tree takes off its clothes and waxes to make loose clothes, ready to go. We are delighted to discover nature every day.

Little by little, but there are some changes that we don't want to see ......

It is often written in articles that "there are a few white clouds floating in the blue sky", but in winter, the sky is often gray here, and even the nearby houses can only be faintly seen. I heard my mother tell me that when I was a child, I used to sit in the courtyard in the summer evening, count the stars one by one, and sing "Little Stars", "Twinkle and twinkle, the sky is full of little stars," but now on a sunny night, the stars are almost counted at once.

Why is that? Two words that come to mind on TV: "air pollution" and "smog".

Haze is formed when the air is low and the air does not flow, and due to the non-flow of the air, the tiny particles in the air accumulate and float in the air. Air pollution is mainly caused by human activities, and the main sources of air pollution are: factory emissions, automobile exhaust, agricultural reclamation and burning, forest fires, cooking smoke, outdoor barbecue, dust, dust generated by construction, etc.

Nature has given us a lot, but human beings still continue to ask for it, without taking into account the feelings of nature, what will nature do in the future?

Nature has nurtured us, the earth has nurtured us, we must protect the environment, so that beauty will always be around.

1. Changes in nature can be divided into physical changes and chemical changes.

2. The physical change of the great combustion refers to the fact that although the state of the substance has changed, generally speaking, the composition of the substance itself has not changed. For example, changes in position, volume, shape, temperature, pressure, and the mutual conversion between gaseous, liquid, and solid states.

3. Chemical change refers to the conversion or transfer of atoms or electrons between molecules in contact with each other, and the formation of new molecules accompanied by energy changes, the essence of which is the breaking of old bonds and the formation of new bonds. Chemical changes are always accompanied by physical changes.