Why are Arabic numerals called Arabic? The fact is that the numbers from 0 to 9 that we use today were developed from a system known as Arabic-Hindu numerals, so named because of its development from a number of different Middle Eastern and Indian language systems. They originally arose from Brahmi and Sanskrit, developing into forms of Eastern and Western Arabic origin, and were used in Europe from about the eleventh century
Secondary education and schools 2024, September
When we talk about "primitive man", we usually talk about cavemen and other species that existed many years ago, but if someone's uncle grunts while laughing and chews with his mouth open, we can also use that word to describe it. So what does the word primitive mean? Interesting? Let's find out
Deserts are some of the most interesting places on the planet, which is not at all surprising. These normally barren areas are home to rare animal and plant species and are unique in terms of natural characteristics. It is known that in some deserts the weather changes dramatically: the temperature drops or rises extremely in short periods of time. Why is it cold in the desert at night? Let's find out the basics
The importance of the public education system cannot be overestimated. This is not only the accumulated baggage of skills and abilities, it is the results of the formation of attitudes to reality, the acquisition of life experience. The great German Chancellor Otto von Bismarck not in vain argued that wars are not won by generals, all victories belong to school teachers
When reading works of classical literature, there is often a need for a special explanation of the meaning of obsolete and little-known words. One of these words is the name of a type of transport popular in the 19th century - droshky. You will learn about the meanings of the word "drozhki", about its etymology from this article
A tuber is a part of a plant that is its modified organ. It is necessary for the body to perform additional functions. Features of its structure and varieties of tubers of various origins will be discussed in detail in this article
Perpendicularity is the relationship between various objects in Euclidean space - lines, planes, vectors, subspaces, and so on. In this material, we will take a closer look at perpendicular lines and the characteristic features related to them
The correct figures are beautiful and graceful. Squares, pentagons, polygons and of course triangles. The equilateral has some remarkable properties and features that are unique to it
The Mohs scale is a 10-point scale created by Carl Friedrich Mohs in 1812 that allows comparison of the hardness of minerals. The scale gives a qualitative, rather than a quantitative assessment of the hardness of a particular stone
Strontium sulfate is a s alt that consists of an acid residue of sulfuric acid and strontium with a valence of two. The formula of this compound is SrSO4. You can also use another name for the presented compound, for example, strontium sulfate
In mathematics, distance can be found in many ways. Their choice depends on the task conditions and the available measuring devices. In their absence, mathematical formulas and geometric theorems are used
If we are given an arbitrary triangle, two sides of which are known, then how to find the third one? With data on its angles, the answer to this question will give us the cosine theorem
Winter holidays are one of the most favorite periods of every child. In addition to the fact that this is a long rest after completing half the path of the school course, it is also a time filled with holidays, fun and joy
How best to decorate a school recreation for the New Year. Features of the decoration of corridors. Preparation of the assembly hall of the school for the New Year's concert. What attributes can be used to decorate the room. Compliance with the necessary safety rules
Abakan - the river, which is one of the largest tributaries of the Yenisei. It flows through the territories of the Krasnoyarsk Territory and Khakassia. In the upper part, the water artery unites with the Bolshoy Abakan River, their total length is 514 kilometers. The area of the drainage basin is 32 thousand square kilometers
The article will tell you what a memo is. From here, the reader can find out what are the most popular and useful reminders: for safety, for students, for tourists
Joy - what is it? A fleeting emotion or a feeling that you need to cultivate in yourself every day? What does our joy depend on - from events, from the actions of other people, or from ourselves? Let's try to understand this article
Let's give a definition of the rate of a chemical reaction, and also talk about the main factors that lead to acceleration, deceleration of the process of interaction of reacting substances. Let's take a closer look at these factors
The Ghor Depression, or the Jordan Rift Valley, has been of great scientific interest from numerous scientists since the 19th century and even earlier. Mysterious geology, a variety of unique environments with their specific, partly endemic faunas and floras, as well as ancient prehistoric and archaeological sites, all contribute to a worldwide interest even today
Initially, cores were used to study the ocean floor. However, their value not only for oceanic, but also for other geological history soon became apparent. To date, hundreds of thousands of samples have been collected from the bottom of all the oceans of the planet and over a vast area of land. What is a core and what is its use?
According to the Collins English Dictionary, an encyclical is an official letter written by the pope and sent to Roman Catholic bishops to make a statement about the official teachings of the Church. This can be a message both to bishops in a particular state, and in all countries of the world
Laws, traditions, rules of conduct, etiquette: all this together makes up a set of social agreements between people. All these rules, if corrected, then through the great resistance of dissatisfied people. But if you want to succeed in life, then pretend, as society requires. Who to pretend? A fair boss, a caring husband, an obedient daughter. But sometimes each of us can overdo it in this field. But people are very sensitive, so you can hear: “He is some kind of
Central Asia is an ancient land about which there are many different legends and tales. The most secret secrets of the East are hidden there. The most famous talented people filled the states of Central Asia with their creations
What is synthesis? What is a synonym for this word? Let's analyze the features of synthesis, give examples of the use of this word in different situations
Computer science is a relatively young science. It originated in the middle of the last century. What was the prerequisite for the emergence? Most likely, these are sharply increased volumes of information that have fallen upon humanity. Next, we will consider what computer science is, the definition of this science, its goals
Primary school is the foundation of the entire educational process. If the child is not deprived of attention, he will become a full member of society
Family Cereals: morphological characteristics, distribution, main representatives, economic importance. Annual and perennial representatives of the cereal family, their importance in human life
This is the name of a portion of food intended for one person, much less often for several. It is packed in a special container (lunch box) made of plastic or wood. This is a convenient option for those who want a balanced meal at school or university, at work and on the road
Stability is what almost everyone wants. Of course, the world is changing, and the word “project” comes to the fore, and now few people think that he can work in one organization for 20 years or more. Yes, and many consider this option as boring and somehow hopeless. Today we will consider a relative of stability - this is “permanently”. We learn the meaning of the adverb, its synonyms and make sentences with it
The question of how to combine work and study is relevant for many modern students. Scholarships are small, parents may not help at all, but money is needed. You have to find a job, and have time not only to earn, but also to study. How to deal with such a load? This is what will be discussed now
Writing utensils have been part of writing etiquette since the 19th century. Since that time, they have evolved significantly from the ink pen to the automatic, and have become widespread thanks to the advertising of convenient writing aids. Today it is unthinkable to imagine life without ordinary ballpoint pens, pencils, felt-tip pens, highlighters
An integrated approach is the use of an appropriate process to break down a problem into the elements needed to solve the problem. Each element becomes a smaller and easier task to represent the entire system as a whole. In this article, we will talk about why it is necessary to apply an integrated approach, how it works, in which areas it has become widespread. And also about what caused the change from an intuitive approach to decision making to a structured one
The sextant is a tool for finding the angle between a celestial body and the horizon line. In this case, stars or planets are used as a guide. In aircraft, such a device is used to determine longitude and latitude
The letter Ψ was born a long time ago, and with each century its scope, as well as the symbol, is expanding. Where did the letter Ψ originate? What is the meaning? In what areas of knowledge does the sign "psi" still retain its relevance? This article will help answer these questions
Criteria-based assessment of students' educational achievements is especially important in the framework of the transition of educational institutions to new federal state standards
Status is a multifaceted concept. This article talks about the main meanings of this word and what it includes
Successfully passing one of the tests is the best way to confirm knowledge of the language. Obtaining a certificate is a prerequisite for admission to foreign higher education institutions, and also greatly expands your opportunities in the English-speaking world. Both documents are valid for two years, after which your test results are deleted
At all times neat legible handwriting was valued. Beautiful smooth lines caused delight and admiration. Even now, when most letters and texts are typed on a computer, neat handwriting is still relevant and in demand
The human liver, which is part of the digestive system, creates the conditions for communication with the outside world and life. This is a very large gland, which plays a leading role in neutralizing the consequences of an unhe althy lifestyle and in the synthesis of bile. Quite often, doctors begin to treat various symptoms without noticing which liver functions are affected
Calcium stearate is used as an emulsifier in food, cosmetic and pharmaceutical industries. This substance is otherwise called additive E572. How safe is this chemical compound for human he alth? And how does it affect the body? We will consider these questions in the article