For humans and any other living beings, radiation exposure is fraught with many he alth problems. Aspects of his influence continue to be studied today
Secondary education and schools 2024, September
In our time it is impossible to live without measurements. Measure length, volume, weight and temperature. There are several units of measurement for all measures, but there are also generally recognized ones. They are used almost all over the world. To measure temperature in the International System of Units, degrees Celsius are used as the most convenient. Only the US and UK still use the less accurate Fahrenheit scale
Sulfate acid: composition, structure, properties, physical and chemical characteristics. Methods of obtaining, the history of the development of knowledge about sulfuric acid, s alts of sulfate acid and their fields of application. Sulfate lye - the concept and use of this substance
Mutual transformations of compounds observed in wildlife, as well as occurring as a result of human activity, can be considered as chemical processes. Reagents in them can be either two or more substances that are in the same or in different states of aggregation. Depending on this, homogeneous or heterogeneous systems are distinguished. The conditions for conducting, the features of the course and the role of chemical processes in nature will be considered in this work
SI prefixes (International System of Units) are used to designate too large and too small values of physical quantities. These prefixes are placed before the corresponding symbols of quantities in physics. Consider in the article frequently used prefixes, their meanings and designations
What are dimensions? Surely many have heard this term in conversation, but not everyone knows its exact interpretation. First of all, when pronouncing this word, a person has an idea of u200bu200bthe size of something. In this article, we will consider all aspects of this concept
In the article we will consider in detail what a figurative expression is. What does it matter, how are they used, we will analyze examples with a detailed interpretation of such statements
Vezhda, hair, neck, right hand, hand, eye, cheek, face, eye, Persian, metacarpus, ramo, mouth, womb, forehead. What unites these words? These are all obsolete names for body parts. In this article we will talk about the word "chelo": we will clarify its meaning, morphological features and select synonyms
What are structural diagrams? What can they be applied to? Block diagrams of enterprises, management and technology
Toxicity is… Definition, general concept. Groups of substances according to the degree of toxicity. Examples of highly toxic substances. Toxic gases and their characteristics
Society is the next stage in the development of human civilization after nature. Both of these concepts can be considered as matter. However, society, unlike nature, is advancing towards the realization of its being. The stronger its progress, the more it separates itself from the original nature
Isaac Newton is an English scientist, historian, physicist, mathematician and alchemist. He was born into a farming family in Woolsthorpe. Newton's father died before he was born. The mother, shortly after the death of her beloved husband, remarried a priest who lived in a neighboring town and moved in with him. Isaac Newton, whose brief biography is written below, and his grandmother remained in Woolsthorpe. With this mental shock, some researchers explain the bilious and unsociable nature of the scientist
"From time immemorial" is an expression that is often used in everyday speech. And the meaning of it for the most part is clear. But as for its origin and spelling, they often cause difficulty
In today's world, many families have dogs. Why a dog is a man's best friend, learn from this article
The leaves on the shoot are not at all random. Their attachment to the axis of the aerial part of the plant has its own patterns. In our article, we will consider what is opposite leaf arrangement
The Russian language is rich in polysemantic words. For example, if you think about the concept of the word "remedy" out of a specific context, you can reach a dead end. This word has several meanings, and each has several synonyms. Let's get it right from the start
Growth and development are one of the main properties of living organisms, including plants. For each systematic group, these processes have their own characteristics. From our article you will learn about the types of growth and development cycles of plants. What do these concepts mean? Let's figure it out together
When the coldest season of the year is approaching, people have a winter mood that directs to creativity and gives the muse. Silver flooring underfoot, magical hanging piles of snow on trees, ice icicles varying in shape and size - all this is the way to real works that give people faith in a dream come true
The famous Ukrainian teacher Vasily Alexandrovich Sukhomlinsky was and remains one of the brightest figures in pedagogy, psychology and literature. His legacy: methodological works, research, stories, fairy tales are valuable primarily for their clear presentation of thought and vivid imagery. He touched upon the most vital aspects of upbringing and education, which are as relevant today as they were half a century ago. This year marks the 100th anniversary of the birth of Vasily Alexandrovich
People love labels. Stereotypes help reduce the world to a set of patterns. Somewhere we do not want to succumb to the charm of commonplace judgments, but mostly we readily accept them on faith and calm down. Today we will talk about the word "great". It is often used by journalists and commentators. We learn the full range of its meaning
Winds are fast currents of air moving horizontally. They can be light and barely noticeable, or they can be strong and powerful enough to demolish everything in their path. What is the nature of the wind? What is a "wind rose"? Let's find it out
Mark Twain is a writer whose name is familiar to everyone. How did he start his career, how did he get his first success, and why did he spend his last years in poverty and loneliness? Read below
The origins of the idiom "stay with nothing" lead to the fairy tale "About the fisherman and the fish". The work condemns reckless greed and shows that these harmful desires are ultimately punishable
No one knows how his act will turn out. And do we always understand that we have done the right thing? And what exactly does this word mean? Actions are an integral part of human life, so it is worth understanding their features and what they are
What are inflorescences? What types of inflorescences exist? Which plants have which inflorescences? Examples, table
A flower is a modified shoot of a plant intended for propagation by seeds. Like any other shoot, it develops from a flower bud. The stem part of the flower is the pedicel and the receptacle. Corolla, calyx, stamen and pistil are formed by modified leaves
Of course, each of us has heard at least something about patience and its importance in life. You may have even heard that sometimes patience bursts like a balloon. In fact, a symbolic phrase is a stable phrase. We will consider it in some detail
Can't find clear information on the types of triangles? Then you are here. The article will help determine the type of figure that is in front of you
Recreational geography is part of a complex science that studies the territorial issues of tourism and recreation aimed at restoring human strength. This discipline studies the interaction of the tourism industry with the components of nature and society. But this is only an encyclopedic concept, if you want to learn more about this branch of geography, then be sure to read this article
As you know, the earth's crust is quite heterogeneous in its structure. Some areas are still subject to the influence of endogenous processes, while others have long been in absolute peace. But do not forget that tectonic movements will constantly subject the Earth's surface to changes, and especially the most vulnerable parts of the crust - geosynclines
We are all part of a living shell - the biosphere. This is a unique ecosystem not only of our planet, but of the galaxy as a whole. Of course, recent studies have confirmed that organic matter has been found both on Mars and on various asteroids, but such a variety of life forms is unique to Earth. If you are ready to expand your horizons a little and go beyond the school curriculum, it's time to talk in more detail about the characteristics of the biosphere, its structure and main functions
This article provides reference material on what sine and cosine are, how to correctly calculate these values. We will also delve into the basics of trigonometry and find out who was the first to discover these concepts in mathematics
After reading this article, you will never again confuse the concepts of "territory" and "water area" and will always use them correctly, in accordance with the context. And also you will learn about what water areas are. What are port water areas and what is their purpose?
Literature, like any other creativity, allows a person to express his opinion, attitude to certain events, admiration or disappointment, emotions. The works of poets and writers of all times were influenced by events in society, political or economic changes. Previously, a frequent occurrence among creative natures was the expression of protest against the arbitrariness of influential people with the help of creativity
Most recently, the film "Jumanji: Welcome to the Jungle" was released, which has already gathered millions of viewers near the screens. Such a long-awaited premiere broke many box office records: at the moment, the picture has collected an unheard-of amount by modern standards - almost $ 1 billion, while some ninety million were spent on the production of the film
Characteristic features of the Middle Ages are the rejection of direct experimental knowledge of the nature of the world and man and the priority of religious dogmas. Due to the prominence of the Christian explanation of the structure of the Universe and the stagnation of the development of many sciences, the centuries from the 5th to the 14th are often called "dark"
Many people think that nature is a disordered and somewhat chaotic phenomenon. Forests and copses, steppes and deserts - supposedly all these are randomly located natural biotopes. It's far from it
The continuity of preschool and school is a special, complex connection. It implies a transition from one level of education to another, which is carried out with the preservation and subsequent gradual change in the content, methods, forms, as well as technologies of education and training
What are the rules for kindergartens today? What determines the choice of games and activities? What are the main tasks of a teacher? As a result of reforms in the field of preschool education, the federal standard and the main educational program began to play a key role in determining the principles of work of preschool educational institutions
What gives a person the ability to work? Work feeds, heals, entertains, satisfies aesthetic needs, inspires respect for the working person. In a word, this is both the goal and means of life. Where do lazy people come from then? Perhaps their parents missed something in their upbringing