|
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese|
BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
How did fire come about? Detailed answer
Directory / Big encyclopedia. Questions for quiz and self-education Did you know? How did fire come about? Fire has been known to man since ancient times. In some caves in Europe, where ancient people lived hundreds of thousands of years ago, coals and burnt bones were found among the stones, which indicates that fires were made in these places. But how did people learn to make fires? We can only guess about it. Primitive man may have first learned to use fire, and only then learned how to make it. For example, lightning could ignite a dry tree, and the wood could begin to smolder. From it, a person could kindle a fire and maintain it for several years. We can only guess how the caveman learned to make fire. Wandering among the stones in the dark and bumping into them, primitive man must have noticed the sparks that appeared when one stone struck another. But several generations of primitive people must have changed, until one of them had the idea of hitting two stones in order to get fire! There is another way to find out how primitive man learned to make fire. We can watch how primitive people do it now. Some of them are at a stage of development at which our distant ancestors were thousands of years ago. Let's look at some primitive ways to get fire. In Alaska, the Indians of some tribes rub two stones with sulfur and strike one against the other. When the sulfur catches fire, they throw the burning stone into dry grass or other dry material. In China and India, a piece of broken earthenware is struck against a bamboo stick. The outer shell of bamboo is very hard and has all the properties of a wick. The Eskimos strike a piece of pyrite (iron pyrite), which is very common in the places where they live, with an ordinary piece of quartz. North American Indians usually rub two sticks together to make fire. In ancient Greece and ancient Rome, there was a completely different way. Then they used special lenses, which were called "burning glass", to collect the rays of the sun at one point. When the heat of the rays gathered at one point, it ignited dry wood. It is also interesting to know that in ancient times, many peoples supported the "eternal fire". The Mayans and the Aztecs in Mexico maintained an ever-burning fire. The Greeks, Egyptians and Romans also kept an eternal flame in their temples. Author: Likum A.
What fruit became iconic in China during the reign of Mao Zedong? In 1968, the Foreign Minister of Pakistan visited China and presented Mao Zedong with a box of mangoes. Mao sent it to workers who were called to Tsinghua University to pacify the feud between the two Red Guard factions. The workers had never seen a mango before and considered the leader's gift almost sacred. The fruits were distributed among the factories and carefully preserved intact, and at one plant, a mango that had begun to rot was boiled in large quantities of water and given a taste of this stew to each employee. For many years, a real cult of the mango, firmly associated with the personality of Mao, reigned in China: plastic copies of the fruit were sold in stores, giant replicas were worn at parades, and the image of the fruit was present on a large number of household items and everyday goods.
▪ How fast is the speed of light in a vacuum? ▪ Why do plants turn towards the sun? ▪ What rule, derived by Leonardo, obeys the trunk and branches of trees?
Artificial leather for touch emulation
15.04.2024 Petgugu Global cat litter
15.04.2024 The attractiveness of caring men
14.04.2024
▪ The microcircuit is cooled by a fan ▪ DDR4 RAM ▪ Robotic dogs will fly to Mars
▪ section of the site Factory technology at home. Article selection ▪ article Old but golden. The art of audio ▪ article When did boxing appear? Detailed answer ▪ article Seller of manufactured goods department (section). Standard instruction on labor protection ▪ article Oils for hair. Simple recipes and tips ▪ article Riddles about snow, ice, frost
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua |
Random interesting fact from the Great Encyclopedia:
See other articles Section 
Latest news of science and technology, new electronics:
All languages of this page