Ozone is a gas. Unlike many others, it is not transparent, but has a characteristic color and even a smell. It is present in our atmosphere and is one of its most important components. What is the density of ozone, its mass and other properties? What is its role in the life of the planet?
Secondary education and schools 2024, September
A lyrical work about homeland, friendship, love and the meaning of life. Is it so easy to see the essence after reading the poem, or is it worth doing a little analysis? And what is needed for this analysis, and what points should be considered before drawing a conclusion?
There are a lot of known problems of cities. They exist in both large settlements and relatively small ones. The study of shortcomings and analysis of their impact on human life is an important work that allows you to determine the optimal line of development and improvement of the situation. The nature and extent of the problems vary widely. Of course, in the current conditions, even if there are all opportunities for this, the shortcomings cannot be completely eliminated, but some can be eliminated, while others can be weakened
Due to the fact that every creature is endowed with respiratory organs, we all get something without which we cannot live - oxygen. In all land animals and humans, these organs are called lungs, which absorb the maximum amount of oxygen from the air. The respiratory system of fish, on the other hand, consists of gills that draw oxygen into the body from the water, where it is much less than in the air. It is because of this that the structure of the body of this biological species is so different from all backbone terrestrial creatures
In the northern part of Tanzania there is a unique Lake Natron. The water in this reservoir is always warm and quite s alty. Gelai volcano is located in the southeast of the lake. Natron is located near the Kenyan border. The water source is the Nyiro River and thermal springs rich in minerals
Let's analyze the meaning of this word. It was used as early as the beginning of the nineteenth century as a means of encouraging action
Where is Yemen or the Republic of Yemen? After reading the article, you can learn a lot of interesting things from the life of an exotic country located among the Arabian sands in Southwest Asia
Nature is very beautiful in any season, even if there is not a single leaf on the tree, and the snow has not yet fallen, or vice versa. When it rains or sleet, people are able to lose heart, the mood changes, and nature benefits. Describing the autumn forest is a truly creative activity. Each person will describe this moment in their own way
Modern schoolchildren and their parents know perfectly well what the USE is. Heated disputes and discussions have been going on for several years. Not everyone agrees with the format and results of this exam. But the Ministry of Education remains adamant and is not going to cancel the exam. Let's find out more about when and why this exam appeared
If you want to learn how to draw a walrus, this article is the best. After reading it, you will learn how to draw and learn a lot of interesting things
In the play of A.P. Chekhov's system of images is represented by three main groups. Let us briefly consider each of them, after which we will dwell in detail on the image of Lopakhin Yermolai Alekseevich. This hero of The Cherry Orchard can be called the brightest character in the play
We invite you to get acquainted with the comedy in verse "Woe from Wit". The retelling of this play by Griboyedov is presented in the article. The work describes the secular society of the period of serfdom. Life in Russia in 1810-1820 is shown in the comedy "Woe from Wit"
All living organisms, inhabitants of the Earth, are open biological systems. To maintain their life, an influx of food, oxygen and water from the external environment and the removal of metabolic products are necessary. It is clear that such excretion of toxins is essential for maintaining the homeostasis of a living organism. What does the absence of this principle lead to? Death occurs due to cell poisoning by its own metabolites. Evolution has contributed to the emergence of organs that perform the functions of removing toxins
Fast, slow, moderate, lively - what does that mean to you? The pace of life? Course of events? Can you answer what relation such an interesting word "andante" can have to these words? Let's get a look
The question of how to understand chemistry is of interest to most schoolchildren. Consider how to easily get to the heart of the subject
Nutrition is a complex process, as a result of which substances necessary for the body are supplied, digested and absorbed. Over the past ten years, a special science dedicated to nutrition has been actively developing - nutriciology. In this article, we will consider the process of digestion in the human body, how long it lasts and how to do without a gallbladder
This extraordinarily beautiful scientific term is associated with romance, adventure and travel. Wind rose… What is it, who and when invented it? You will learn about this from our article
Many students are wondering how to multiply and add numbers, how to divide and subtract them. In high school, the topic of how to calculate the root of numbers is raised. It is not easy for everyone, the majority skips lessons, some are not entirely attentive in the learning process. For these reasons, not having grasped the essence and not having mastered the material, they suffer in the future
There are a lot of expressions in Russian, the origin of which we do not know anything. We use them in everyday life, we know or guess about the approximate meaning, but we have no idea where it came from. What does it mean "brought under the monastery"? Where did this expression come from?
Hydrogen H is a chemical element, one of the most common in our universe. The mass of hydrogen as an element in the composition of substances is 75% of the total content of atoms of another type. It is included in the most important and vital compound on the planet - water
Chemicals - simple and complex, organic and mineral, their classifications, physical and chemical properties
The most famous and used in human life and industry substances belonging to the category of polyhydric alcohols are ethylene glycol and glycerin. Their research and use began several centuries ago, but the properties of these organic compounds are in many ways inimitable and unique, which makes them indispensable to this day
Ozone is a gas that has extremely valuable properties for all mankind. The chemical element by which it is formed is oxygen O. In fact, ozone O3 is one of the allotropic modifications of oxygen, consisting of three formula units (O÷O÷O). The first and more well-known compound is oxygen itself, more precisely the gas that is formed by its two atoms (O=O) - O2
Educational work at school is aimed at developing patriotic qualities in the younger generation. The classroom hour in the 5th grade is thought out by the teacher in such a way that it contributes to the formation of a respectful attitude among students towards representatives of other nationalities
Peculiar and very ancient plants are found in the forest zone of the Northern and Southern Hemispheres. The genus Lycopodium, to which the club club belongs, existed in the forests of the Paleozoic over 350 million years ago. Many signs indicate that this group is gradually fading away. But in the structure of club mosses there are features of a higher organization compared to mosses
San - what is it? Usually this lexeme is associated with the clergy, with their hierarchy. Such an association corresponds to the actual state of affairs. However, this is not the only area of application of the word. What does the word "san" mean yet? This will be discussed in the article
A large number of educational institutions literally drives parents into a dead end. Finding an answer to the question of where to send a child is difficult. Therefore, it is worth figuring out what each of the institutions is like and how an ordinary school differs from a gymnasium and a lyceum
Preparing food is no less important than cooking. This is especially true for fish dishes. Let's find out what it consists of and how the primary processing of fish is carried out
It's hard to imagine social networks without various statuses and jokes. It is they who fill the profiles with meaning and invite them to stay on their personal page for a long time. Cool statuses about women, men and children are relevant and often used. To express what you want as much as possible, you should choose the appropriate sayings
The driver is the so-called "driver" of the carriage, wagon. The crew itself, along with the coachman, could also be called this word. Sometimes this was the name of a peasant who was engaged in transportation. Cab drivers, depending on the crew, were divided into categories and even categories
Today we have a wonderful word in the networks. It is beautiful both because it has good content and because it evokes indirect, but still associations about Russian classical literature. But, as always, not only hoary antiquity is assumed, but also a relative recent past. In other words, today we are talking about the noun "darling", and this should be interesting
Of course, one should not think that the ability to compare is something that only investigators or police officers need. A person is always involved in the process of thinking about the facts, their similarities and differences, without even noticing it. We look at the thermometer outside and think about what we should wear to match the weather. Discuss the meaning of the word
In this article, we will consider the features of the "School of Russia" program. To date, it is one of the most common and most developed both from a scientific and practical point of view. The information will be useful to teachers and parents
Almost every one of us has come across the word "powder". It is quite common in everyday life. But not many thought about its origin. About what "powder" is, its types and scopes, further in the article
In this article we will talk about the meaning of the word "shanga", which many have probably heard, but few have an idea what it is. In addition, grammatical features of the word, forms of change by cases will be given, its origin will be told, examples of the use of the word "shanga" in artistic speech will be given
The country of opportunities, where many immigrants from the post-Soviet space aspire, and not only. In the United States, migrants from different countries are "bursting" in search of a better life. But, as a rule, they find nothing there except poverty. The form of government of the United States of America is a federation. In the article we will talk about which US state is the largest in terms of area and discuss life in a multinational country
Fish is the largest group of aquatic chordates in terms of species diversity, which is also the most ancient. Fish inhabit almost all fresh and s alt water bodies. All their organ systems are adapted to living in the aquatic environment. According to the accepted scientific classification, Pisces are assigned to the domain Eukaryotes, the kingdom Animals and the type Chordates. Let's take a closer look at the superclass
The lateral line of a fish is an important sensory organ. It is also called the sixth. It is very important for fish, affects their behavior and life in general
Of the many geometric shapes, one of the simplest can be called a parallelepiped. It has the shape of a prism, at the base of which is a parallelogram. It is not difficult to calculate the area of a parallelepiped, since the formula is very simple
All parents want their child to fully develop and be literate. This is easy to achieve. If there is a desire, we can assume that half the work in the process of preparing entertaining educational games is done. It is worth coming up with interesting riddles about watermelon, apple, cucumber and other foods. Such puzzles will be easy for even the smallest, because almost everyone knows the names of food