Secondary education and schools

If you try to find synonyms for the word "original source", you can easily make sure that there are not so many of them and all of them only partially reveal the meaning of this term. The closest in meaning are lexemes: source, root cause, beginning, origin. Last modified: 2025-01-23 12:01

A flower is one of the most amazing creations of nature. And from a biological point of view, this organ performs the most important function - it provides generative reproduction of plants. From our article you will learn about its structural features, diversity and structure of a simple perianth. Last modified: 2025-01-23 12:01

Sometimes a person, sharing with another opinion about someone, says that he fills his own worth. What is meant here? So they say, if a man or woman begins to behave in such a way that they try to put themselves above others, to seem inaccessible, more significant than they really are. Read more about the expression "fill your own price" will be discussed in the article. Last modified: 2025-01-23 12:01

Polyhedra attracted the attention of mathematicians and scientists even in ancient times. The Egyptians built the pyramids. And the Greeks studied "regular polyhedra". They are sometimes called Platonic solids. "Traditional polyhedra" consist of flat faces, straight edges, and vertices. But the main question has always been what rules these separate parts should follow. Last modified: 2025-01-23 12:01

A soft eraser is an indispensable thing for transferring halftones and highlights. Unlike the usual vinyl or rubber ones from school days, it is flexible, easily stretched and compressed. The nag changes shape, like plasticine. Some artists even use it for other purposes and create figurines and entire sculptures that decorate the desktop. Last modified: 2025-01-23 12:01

An educated person tends to look for the meaning and definition of unfamiliar words. This allows you to constantly improve and replenish vocabulary. The word “order” belongs to acquaintances from childhood. Few people are interested in the definition, because this noun seems to have been driven into memory by my mother in early childhood. Most did not even think that the word “order” has so many meanings. Last modified: 2025-01-23 12:01

Sunrise and sunset are daily occurrences that can be enjoyed forever. Taking it for granted, you are rarely interested in what algorithm the celestial body moves, what affects the trajectory, why unusual things happen: polar days and nights, northern lights or an eclipse. Last modified: 2025-01-23 12:01

A chandelier is a source of light that fills a room at night. The choice depends on the style and direction in the design. Materials are selected exclusively for the style of rooms, taking into account humidity and environment. The height and size of the shades are taken into account, which can be equipped with swivel mechanisms. Last modified: 2025-01-23 12:01

In today's world, almost everything is tied to the cost of oil. This black ruler has her own unit of measure - 1 barrel of oil. Often this phrase is found in modern economics. Many people constantly use it in their conversations, but few people know what it is equal to. Our article was created to eliminate economic illiteracy. Last modified: 2025-01-23 12:01

Autumn is a strange time of the year. And only a few were lucky enough to know its velvety grandeur with a golden scattering of leaves and a platinum sky. Although, not about that now, but about the essay based on Popkov's painting "Autumn Rains" in the form of a review. Recently, a new fashion has reigned in the school curriculum: write essays-reviews about books or paintings. But, despite the fact that there are requirements, it is rare that anyone will tell you how to write such essays correctly. This is what we're going to fight today. Last modified: 2025-01-23 12:01

Writing essays is not given to everyone, but the modern education system requires it from every student. And if for some it is not difficult to write a text, then others spend a lot of time only to understand how to start writing. Last modified: 2025-01-23 12:01

Interference - what is it? This word does not carry a positive charge, as it is associated with phenomena that interfere with us, create obstacles and slow down the process. But the question is, are obstacles always a bad thing? After all, it is in overcoming them that character is tempered. Details of what the word interference means will be discussed in the article. Last modified: 2025-01-23 12:01

The article indicates the interpretation of the word "big man". Not everyone can correctly indicate what this noun means. The article also provides examples of the use of this word. Multiple synonyms listed. Last modified: 2025-01-23 12:01

The article indicates what interpretation is endowed with the word "fervent". This is an adjective that is used to characterize nominal parts of speech. The article indicates its exact lexical meaning. To consolidate the information, we gave examples of sentences with this word, and also indicated several synonyms. Last modified: 2025-01-23 12:01

In this article you will find the definition of the word "sneak". What does this linguistic unit mean? What is it used for in speech? The article indicates the lexical meaning of the word "ste althily". You can use it correctly in sentences. Last modified: 2025-01-23 12:01

What is the meaning of the words "sea shaft"? With the adjective "marine" everything is more or less clear. It means "connected to the sea". Whereas with the noun "shaft" there are nuances. This is due to the fact that it has a large number of values. Which one is suitable for our case? You can find out about this by understanding the meaning of the words "sea shaft". Last modified: 2025-01-23 12:01

Human communication is made up of many factors, and sound is one of the key ones. Words can express feelings, convey information or please others with the help of a song. The only hindrance will be the hubbub. What it is? Read the article and find out what forms noise can take. Last modified: 2025-01-23 12:01

It's always nice to meet colleagues or make friends. But the main obstacle to establishing social ties is quarrelsomeness. What is it, when and how does it manifest itself, why does it appear in society in principle? The most important aspects are listed in the article. Last modified: 2025-01-23 12:01

Is it worth following outdated moral standards if it is contrary to common sense and serves only to assert the power of conservative authorities? If a person is tired of traditions, he behaves boldly. When is this appropriate, and when is it better to be modest? Find out by reading the article. Last modified: 2025-01-23 12:01

Inert material is a free-flowing non-metallic material of natural and artificial origin, used in civil, road and industrial construction. It is also used for general construction work. Let's take a closer look at inert materials: what they are, where they are used. Last modified: 2025-01-23 12:01

In the West, the first fortresses began to be built in the VI century BC and represented a whole system of fortifications. Celtic forts on the hills have survived well to this day and clearly demonstrate the complex internal structure with underground passages and labyrinths. Last modified: 2025-01-23 12:01

That storm, which, as everyone remembers, covers the sky with romantic haze, spins whirlwinds of snow, howls like an animal, and can cry with the voice of a child, is beautifully described by the poet A. S. Pushkin. And the next day, the poet will have frost, snow sparkling in the sun and, in general, a wonderful day. However, let's take a closer look: there are some consequences from yesterday's storm. And before harnessing a horse to a sled for a walk, it is worth assessing the damage caused by yesterday's elements. Last modified: 2025-01-23 12:01

Any power, and especially the supreme one, gives rise to people who try to stay closer to the ruler. Proximity to the prince, king or emperor - the possibility of obtaining material we alth. The disfavor of the ruler entails not only the loss of privileges, but also sanctions. Last modified: 2025-01-23 12:01

In different countries, people measure the year in different ways. The Gregorian calendar is the most widely used. But there are others, and there are many: Buddhist, Islamic, Chinese, Japanese. What is the correct year? Astronomical. Last modified: 2025-01-23 12:01

Three angles, three sides - that's all that forms the simplest figure on the plane. It looks like a children's riddle: two ends, two rings, carnations in the middle. But a triangle is to geometry almost the same as an atom is to physics. Nothing is easier and everything can be created with it. Last modified: 2025-01-23 12:01

Roundworms, also known in biology as nematodes, belong to a group of parasites that are recognized as free-moving. Scientists have long proven that they are the primary type of the molting species. In the animal kingdom, nematodes are considered one of the most diverse groups. Last modified: 2025-01-23 12:01

In the novel "The Secret of Two Oceans" and in the adventure film of the same name, the heroes did unimaginable things with ultrasonic weapons: they destroyed a rock, killed a huge whale, and destroyed the ship of their enemies. The work was published back in the 30s of the XX century, and then it was believed that in the near future the existence of a powerful ultrasonic weapon would become possible, the whole thing is only in the availability of technology. Today, science claims that ultrasonic waves as a weapon are fantastic. Last modified: 2025-01-23 12:01

Our perception of the pitch of a sound and its other properties is determined by the characteristics of the acoustic wave. These are the same characteristics that are inherent in any mechanical wave, namely the period, frequency, amplitude of oscillations. The subjective sensations of sound do not depend on the length and speed of the wave. In the article we will analyze the physics of sound. Pitch and timbre - how are they determined? Why do we perceive some sounds as loud and others as quiet? The answers to these and other questions will be given in the article. Last modified: 2025-01-23 12:01

The words "aviation" and "aeronautics" until the 20s. 20th century were synonyms. Everything changed at the beginning of the last century. Aeronautics began to be called movement with the help of devices that are lighter than air, and aviation - flying on airplanes. That is, ships that are heavier than air. In the article we will consider in detail the history of aeronautics, the physics of the process. Last modified: 2025-01-23 12:01

Pressure is a physical quantity that is calculated as follows: divide the pressure force by the area on which this force acts. The force of pressure is determined by the weight. Any physical object exerts pressure because it has at least some weight. The article will discuss in detail the pressure in gases. Examples will illustrate what it depends on and how it changes. Last modified: 2025-01-23 12:01

Pascal's law for liquids and gases says that pressure, propagating in a substance, does not change its strength and is transmitted in all directions equally. Liquid and gaseous substances behave under pressure with some differences. The difference is due to the behavior of particles and the weight of gases and liquids. In the article we will consider all this in detail with the help of visual experiments. Last modified: 2025-01-23 12:01

Atmospheric pressure is the force with which we are affected by the surrounding air, i.e. the atmosphere. The article will present experiments during which we will make sure that air pressure really exists. We will find out who measured it for the first time, what occurs with an uneven distribution of atmospheric pressure, and much more. Last modified: 2025-01-23 12:01

Since the force of gravity acts on a liquid, a liquid substance has weight. Weight is the force with which it presses on the support, that is, on the bottom of the vessel in which it is poured. Pascal's law says: the pressure on the fluid is transmitted to any point in it, without changing its strength. How to calculate the pressure of a liquid on the bottom and walls of a vessel? We will understand the article using illustrative examples. Last modified: 2025-01-23 12:01

Not everyone knows that atmospheric pressure is different at different heights. There is even a special device for measuring both pressure and altitude. It's called a barometer- altimeter. In the article, we will study in detail how atmospheric pressure changes with height and what does air density have to do with it. Let's consider this dependence on the example of the graph. Last modified: 2025-01-23 12:01

Atmospheric pressure is the force with which air presses on the Earth, man and everything that surrounds him. The article will tell you how in the XVII century. with the help of the experiment, the force of air pressure was shown for the first time. It is very interesting! We will learn how atmospheric pressure is indicated and how it is measured. Last modified: 2025-01-23 12:01

Work in physics is a value that is found by multiplying the module of the force that moves the body by the distance it has moved. In the article, we will consider in detail the situations when the body moves and remains motionless. We learn the formula of work and its units of measurement. Last modified: 2025-01-23 12:01

The physics of the structure of matter was first seriously studied by Joseph J. Thomson. However, many questions remained unanswered. Some time later, E. Rutherford was able to formulate a model of the structure of the atom. In the article we will consider the experience that led him to the discovery. Since the structure of matter is one of the most interesting topics in physics lessons, we will analyze its key aspects. We learn what an atom consists of, learn how to find the number of electrons, protons, neutrons in it. Last modified: 2025-01-23 12:01

To understand how a hydraulic press works, let's remember the rule of communicating vessels. Its author Blaise Pascal found that if they are filled with a homogeneous liquid, then its level in all vessels is the same. In this case, the configuration of the containers and their dimensions do not matter. The article will describe several experiments with communicating containers that will help us understand the device and principle of operation of a hydraulic press. Last modified: 2025-01-23 12:01

Happiness is an amazing feeling that helps a person to live well. But what do students think about this? In this article, you can find several essays on the topic "Happiness for me is …", which will tell about this wonderful feeling. Last modified: 2025-01-23 12:01

Leo Tolstoy is one of the world's greatest novelists, thinker and philosopher. His main works are known to everyone and everyone. "Anna Karenina" and "War and Peace" are the pearls of Russian literature. Today we will discuss the three-volume work "War and Peace". How was the famous novel created, what interesting facts about it are known to history?. Last modified: 2025-01-23 12:01