Science

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Great chemists of the world and their work
Alexander Nikolaevich - Emperor of All Russia: years of government, reforms, personal life
"Because of this" or "therefore"? How is this word spelled? Usage examples and rules

Literary quiz based on Pushkin's fairy tales
A quiz on Pushkin's work with answers, the purpose of which is to consolidate the studied material, control the knowledge of students, can be held at home, as a game with children
› Russian peasant: lifestyle, way of life and customs
› How did the name "Veliky Ustyug" come about? History of Russian cities
› Armand de Caulaincourt, French diplomat. "Napoleon's campaign in Russia"
› Bironovism is Definition, features and interesting facts
› Courageous is Interpretation and meaning of the word
› Dagestan languages: history, origin, why are they attractive?
› White planaria: type of worms, structure, lifestyle

How old is the world? Hypotheses for the origin of life on Earth
In ancient times, concepts such as the age of the entire universe and the age of the Earth had strong differences. The basis for assessing age and life on planet Earth for Christian philosophers was the Bible. As a rule, they gave our planet only a few thousand years of age
› Mountains of the Khibiny. Location on the map, height and photo
› Nizhny Novgorod province: counties, villages and villages
› Analysis of A. S. Pushkin's poem "Winter!.. A peasant triumphant"
› Unit of weight in ancient Greece: the main measures of mass
› Rivers of the Sverdlovsk region: Ufa, Tura, Sosva, Iset
› The angle of incidence of the beam in the phenomena of reflection and refraction
› Composition based on the painting "Autumn Rains"

Power of a set: examples. Power of set union
The cardinality of a set is a generalization of the concept of quantity (the number of elements of a set), which makes sense for all sets, including infinite ones. There are larger, there are smaller infinite sets
› Flag of Victory in the Great Patriotic War
› Kuntsevo cemetery - a necropolis of the Soviet era
› "Arena" is an ambiguous word
› Rutherford's planetary model, an atom in Rutherford's model
› Types and classification of documents
› Scientific organization of labor is Definition, basics, characteristics, goals, objectives and application in business
› Optimal working conditions - what is it? Definition, examples