Secondary education and schools

"And God said, 'Let there be light!' and there was light." Everyone knows these words from the Bible. But what is light in its nature?. Last modified: 2025-01-23 12:01

Our planet is spherical and tilted. These features of the Earth create different climatic zones on its surface. This is directly related to the unequal absorption of the thermal energy of the Sun by the surface of the planet. Last modified: 2025-01-23 12:01

Vegetation - what is it from the point of view of various fields of science? What ecological, production and evolutionary significance does this process have?. Last modified: 2025-01-23 12:01

The city of Brussels is the capital of Belgium and the heart of the entire metropolitan area. It consists of 19 communes. The total population of the capital region is approximately 2 million people, and the capital itself is about 163 thousand. Last modified: 2025-01-23 12:01

When a person does something indescribable and illegal, then he is accused of outrage, this is obvious. We repeat many words over and over again, but do we know what they really mean according to the explanatory dictionary? Few people look into a wonderful book, many rely on context and habit, today we will analyze the word "outrage". Last modified: 2025-01-23 12:01

What is kinematics? Kinematics is a branch of mechanics that studies the mathematical and geometric methods of describing the motion of idealized objects. The topic of today's article will be aspects that are somehow related to the concept of “point kinematics”. We will discuss many issues, but we will start with the most fundamental concepts and explanations of their application in this area. Last modified: 2025-01-23 12:01

Acetoone (dimethylketolne, propanoon-2) is an organic substance with the formula CH3-C(O)-CH3, the simplest representative of saturated ketones. It got its name from lat. acetum - vinegar. This is due to the fact that earlier the substance was obtained from acetates, and synthetic glacial acetic acid was obtained from acetone itself. Last modified: 2025-01-23 12:01

In this article you can find out how many digits are in the tens of millions place. We will understand what it is, how many numbers there really are, we will learn a lot of other information that will be very useful to people specializing in this area. In the article we will reveal all the myths and facts. We will support the information in the material of the article with photographs, and at the end we will draw a conclusion. So, how many digits are in the millions place?. Last modified: 2025-01-23 12:01

Kuren - what is it? As a rule, this word is associated with a hut, a dwelling, and also with the Cossacks. And this association is correct. However, these are not all interpretations. It turns out that this term has several more meanings, not necessarily related to housing. Last modified: 2025-01-23 12:01

Every plant has a seed, thanks to which it reproduces. What is the structure of apple, pumpkin and sunflower seeds? What are the similarities and differences between them, read the article. Last modified: 2025-01-23 12:01

Even in biology lessons, teachers talk about various representatives of the fauna. Among them are the first chordates and vertebrate inhabitants of our planet. These include fish and amphibians. Read about the similarities and differences between fish and frogs in the article. Last modified: 2025-01-23 12:01

How long does pregnancy last? Only 9 months, which is equal to 40 weeks. The arithmetic is simple, but there is a calendar plan (medical) where each month has only 4 weeks, not 30-31 days. How to correctly calculate the necessary time for passing tests, undergoing ultrasound and the birth itself?. Last modified: 2025-01-23 12:01

Mathematics originates from Antiquity. Thanks to her, architecture, construction and military science gave a new round of development, the achievements that were obtained with the help of mathematics led to the movement of progress. To this day, mathematics remains the main science that is found in all other sciences. This article will focus on derivatives and their application in practice. Last modified: 2025-01-23 12:01

Maintaining a normal level of metabolism in the body, called homeostasis, is carried out with the help of neuro-humoral regulation of the processes of respiration, digestion, blood circulation, excretion and reproduction. This article will consider the system of excretory organs of humans and animals, their structure and functions, as well as their significance in the metabolic reactions of living organisms. Last modified: 2025-01-23 12:01

Manganic acid is an inorganic, unstable acid of a characteristic purple-purple color, belonging to the class of strong acids. Its chemical formula is HMnO4. This substance is very specific both in its properties and characteristics, and in origin - it has not been isolated in its pure form, it exists only in the form of a solution. However, much more can be said about him. But now we will talk only about the most important characteristics and properties. Last modified: 2025-06-01 07:06

In this article you can find out not only the meaning of the word "get bored", but also its morphological features, examples of use. You can also find here the morphological analysis of the word, learn the rules for using this word in combination with other words. Last modified: 2025-01-23 12:01

Mathematical expressions and problems require a lot of additional knowledge. LCM is one of the main ones, especially often used in working with fractions. The topic is studied in high school, while it is not particularly difficult to understand material, it will not be difficult for a person familiar with degrees and the multiplication table to highlight the necessary numbers and find the result. Last modified: 2025-01-23 12:01

For the formation of spelling skills, morphemic parsing of a word or some kind of linguistic analysis, with the help of which its structure is parsed, is very important. Morphemes are the smallest meaningful parts of vocabulary units: prefixes, suffixes, roots and endings. And in the article we will consider in detail the procedure for conducting this analysis. Last modified: 2025-01-23 12:01

Roman numeration originated, as the name suggests, in Ancient Rome. There are seven basic symbols: I, V, X, L, C, D, and M. These symbols were first used between 900 and 800 BC. e. The numbers were designed to be used as a general method of counting needed to develop relationships and trade. Finger counting got out of control, so to speak, when the count reached 10. Last modified: 2025-01-23 12:01

The smell of this gas is known to everyone - you can immediately feel it if you open a jar of ammonia. We were told something about its properties at school. It is also known that it is one of the key products of the chemical industry: it is the easiest way to turn nitrogen into it, which does not like to enter into chemical reactions so much. Last modified: 2025-01-23 12:01

We have been wondering since childhood why the skin wrinkles from water. At times we liked to look at our fingers after the bath. Parents answered simply - the fingers absorbed the water, so they became like that. And we believed them. But it turns out that not everything is so simple. After all, for some reason, other parts of the skin do not wrinkle?. Last modified: 2025-01-23 12:01

The key to a successful child's learning process is the ability to read, which is formed in virtually the entire primary school, and for many this skill develops further. Some continue to train it into adulthood, which allows them to quickly read material of the same complexity and volume at different stages of their own lives. Last modified: 2025-01-23 12:01

Many people wonder how to round numbers. This need often arises for people who connect their lives with accounting or other activities in which you need to count a lot. Rounding can be carried out to integers, tenths, and so on. And you need to know a simple rule so that the calculations are still more or less accurate. Last modified: 2025-01-23 12:01

School time for most adults is associated with a carefree childhood. Of course, many are reluctant to attend school, but only there they can get basic knowledge that will later be useful to them in life. One of these is the question of what is a circle and a circle. Last modified: 2025-01-23 12:01

What is a rendezvous? It's the same as a date. It is a form of social interaction aimed at the best possible assessment of a person of the opposite sex for suitability to be a partner for intimate relationships or marriage. This word has many meanings. But usually it means the act of meeting people of the opposite sex as a couple. Last modified: 2025-01-23 12:01

The problem of the correct spelling of different words is especially typical for a Russian person. After all, our language is incredibly difficult not only for foreigners, but also for those who speak it since childhood. There are so many exceptions to the rules that it's hard to remember them all. One of these difficult turnovers is "thanks in advance." How is it spelled? Maybe it's better to use the word "in advance"? This article aims to sort out this difficult problem. Last modified: 2025-01-23 12:01

This article will acquaint the reader with the structure of the simplest organisms, namely, focuses on the structure of the contractile vacuole, which performs an excretory (and not only) function, talks about the meaning of protozoa and describes ways of existing in the environment. Last modified: 2025-01-23 12:01

The capital of Texas (USA) is the city of Austin. It was founded in 1839 and is now the center of the state's administrative and political activities. This metropolis is named after one of its founders. The population of the city is just over 885 thousand people. Last modified: 2025-01-23 12:01

Volcanoes as a geological phenomenon are spread over the entire surface of the globe. On the territory of the state of Chile there are a large number of volcanoes, both active and extinct. For local residents, a volcano in Chile is a common phenomenon. Last modified: 2025-01-23 12:01

Many words of the Russian language are forgotten over time. It would seem that they are not needed. But this ignorance can do a disservice to a child in school or embarrass an adult. Let's figure out what an armyak is. Last modified: 2025-01-23 12:01

Where is India, a state with a vibrant and unique culture? Its unique traditions, architecture and history have had a great influence on the entire world culture. The Hindustan Peninsula is the birthplace of Indian traditions and teachings. Last modified: 2025-01-23 12:01

Kazan is the capital of Tatarstan. The city has a thousand-year history, original culture, developed economy, and is the scientific center of the republic. There is a large port on its territory. On which river does Kazan stand - on the Volga or on the Kazanka?. Last modified: 2025-01-23 12:01

Have you ever thought about the meaning and importance of such part of a word as a prefix? Indeed, in the Russian language there are a huge number of nouns, adjectives, verbs that have an attached part in their composition. This article will discuss in detail the prefix "re-". Last modified: 2025-01-23 12:01

How to hold a parent-teacher meeting? It is worth considering the theme of the event in advance. Making a clear plan is the way to success. Last modified: 2025-01-23 12:01

The integrated lesson as such is no longer "terra incognito" either for young teachers or for professionals with experience and experience. However, it always requires special preparation, careful planning and great dedication from both teachers and students. In fact, two (or more) subjects are involved in one lesson, albeit related, but each with its own specifics. Last modified: 2025-01-23 12:01

In this article we will get acquainted with the concept of division. This is a complex term that can be used in a wide variety of areas of human activity, and its consequences are observed in the nature of living organisms. Regardless of the scope of the term and / or the environment of the process, is an extremely important concept. Last modified: 2025-01-23 12:01

Among the various types of chemical reactions, a special place is occupied by redox processes that underlie the most important phenomena of animate and inanimate nature: combustion, decomposition of complex substances, synthesis of organic compounds. Potassium permanganate, whose properties we will study in our article, is one of the most powerful oxidizing agents used in laboratory and industrial conditions. Last modified: 2025-01-23 12:01

Rotational dynamics is one of the important branches of physics. It describes the reasons for the movement of bodies in a circle around a certain axis. One of the important quantities of the dynamics of rotation is the moment of force, or torque. What is a moment of force? Let's explore this concept in this article. Last modified: 2025-01-23 12:01

Our planet is conventionally divided into four hemispheres. How are the boundaries between them defined? What are the characteristics of the hemispheres of the Earth?. Last modified: 2025-01-23 12:01

Red, white and blue colors are often found in the symbols of the Slavic states. They are present on the flags of Russia, Croatia, Slovakia, Serbia, as well as other countries and regions. They are called pan-Slavic colors, but what does this term mean? How did he appear? Let's figure it out. Last modified: 2025-01-23 12:01