|
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese|
BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
What is the origin of the goldfish? Detailed answer
Directory / Big encyclopedia. Questions for quiz and self-education Did you know? What is the origin of the goldfish? The ancestor of the goldfish is the carp. Greenish-gray carp are found in huge numbers in the lakes and rivers of China and Japan, and this is where the goldfish comes from. The Chinese have been raising goldfish for centuries, and the Japanese have been breeding them for over 400 years! Goldfish were unknown in Europe until a few were brought here about 200 years ago. They were presented to the mistress of the French King Louis XV, Madame Pompadour. Since she was a trendsetter at that time, others began to import fish. The sizes of goldfish range from 4 to 30 centimeters. The common varieties of goldfish, such as the fan, comet, and nymph, are best known in the West. The common goldfish has a small body and fairly short stiff fins. The fan goldfish has a shorter, fatter body with a double tail and fins. The American-grown comet has a small body with a long, single, deeply forked tail that flutters freely. The nymph resembles a comet, but its body is short and rounded. All three breeds can be kept in an aquarium and can be found in the homes of millions of people. If you want to keep goldfish, there are a few things you need to know about caring for them. A lowered back fin in a fish is a sure sign that it is unhealthy. A fungal disease caused by parasitic plants is quite common among them. In this case, a whitish coating appears on the fins of the fish, which spreads throughout the body. If this plaque reaches the gills, then it prevents the fish from breathing, and it dies. This disease can be cured by washing the fish in a saline solution, which can also be done when her fins are lowered. One tablespoon of salt per 4 liters of water at the same temperature as in the aquarium is enough for a daily 30-minute bath. The fish should be placed in a shallow container containing this solution and left under low light. Then the aquarium and algae should be soaked for four hours in a very weak solution of potassium permanganate, rinsed and filled with fresh clean water. After two or three days, fish can be launched there. Author: Likum A.
Who painted the first pictures? The first artists on earth were cavemen. On the walls of caves in southern France and Spain, colored drawings of animals were found, which were made in the period from 30 to 000 BC. Many of these drawings are surprisingly well preserved because the caves were unknown for many centuries. Ancient people drew wild animals that they saw around them. Human figures, very immature in technique, but drawn in lifelike poses, have been discovered in Africa and eastern Spain. Cave artists painted the walls of the caves with a variety of bright colors. Earth ocher (iron oxides of various colors - from bright yellow to dark orange) and manganese (a metallic element) were used as dyes. They were crushed into powder, mixed with fat, animal fat and applied with a kind of brush. Sometimes dyes, crushed into powder and mixed with lard, were filled with wooden sticks, which became like “colored pencils”. Cavemen had to make tassels from animal hair or plant fibers and sharp, honed flint chisels for scratching lines. One of the earliest civilizations appeared in Egypt, and then there were artists who painted pictures. Many works of art were created to decorate the pyramids and tombs of pharaohs and other important people. On the wall canvas of the tombs, artists immortalized scenes from a person's life. They used watercolors and whitewash. Another ancient civilization - the Aegean - also reached a significant level of development of the art of painting. Their artists worked in a free and elegant style, they depicted the life of the sea, animals, flowers, sports games. Their drawings were made on wet plaster. We now call this special kind of painting frescoes. So you see that drawing has its roots in the very early years of human civilization.
▪ Where else is there caffeine besides tea and coffee? ▪ Near what on the day of the opening of Disneyland, the workers put signs with inscriptions in Latin?
Machine for thinning flowers in gardens
02.05.2024 Advanced Infrared Microscope
02.05.2024 Air trap for insects
01.05.2024
▪ Pocket Nuclear Resonance Scanner ▪ The timing and quality of sleep varies by gender. ▪ Ultrasound helps drugs reach their target ▪ Record Density DDR5 Chips 24Gbps ▪ Pocket electronic encyclopedia
▪ section of the site Cultivated and wild plants. Article selection ▪ article Negligence. Popular expression ▪ article How fast does a solar-powered car go? Detailed answer ▪ article Common watercress. Legends, cultivation, methods of application ▪ Article Device for checking eyesight. Encyclopedia of radio electronics and electrical engineering ▪ article Simple phone. Encyclopedia of radio electronics and electrical engineering
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