- Wind is a stream of air that moves rapidly parallel to the earth's surface. On Earth, the wind is a stream of air moving mainly in a horizontal direction; on other planets, it is a stream of atmospheric gases characteristic of them.
- What kind of air can fly
- restless air
- What element can turn a calm into a storm?
- moving air
- What element forms the bizarre landscapes of the Sahara desert
- Movement of air on the earth's surface
- Airflow
- Movement, air flow
- Air movement in the horizontal direction
- Diamond (from other Greek ἀδάμας “indestructible”, through Arabic ألماس [’almās] and Turkish elmas) is a mineral, a cubic allotropic form of carbon.
- What stone can be found in a kimberlite pipe
- What gem can only be destroyed by heat
- Antarctica (Greek ἀνταρκτική - the opposite of the Arctic) is a continent located in the very south of the Earth, the center of Antarctica approximately coincides with the geographic south pole.
- What part of the world is not on the oldest globe?
- Which continent is the highest?
- Where on Earth is the cleanest air?
- Which continent can be proud of the highest altitude
- The search for which continent was the second expedition of James Cook dedicated to?
- The UN flag depicts a globe of the Earth, which should emphasize the equality of all countries, and from which continent does the view of the globe open?
- On which continent is the largest number of fallen meteorites?
- Where in the world is the largest amount of fresh water concentrated?
- In what place
Civil aviation once began with balloons: before airplanes and helicopters, it was like walking to the moon, and people began to fly on balloons back in the 18th century. Today we will tell you how it happens on the 21st: I went to Cappadocia - a region in central Turkey - where mass flights are carried out almost every day; balloons in the air - several dozen at the same time, and passengers, respectively, several hundred.
A little physics. How a hot air balloon flies
A modern passenger balloon is correctly called a hot air balloon, or hot air balloon - by the name of the Montgolfier brothers, who in 1783 made the first flight on an aircraft of this type. As part of import substitution, the story has become popular that in fact the first hot air balloon was built half a century before by the Russian inventor Kryakutnoy, but this is just a hoax created after the French flight and promoted in Soviet times.
The principle of flight of a hot air balloon is very simple: inside its shell there is air whose temperature is higher than the temperature of the surrounding air. Since the density of warm air is lower, it, according to the law of Archimedes, tends upward under the action of a buoyant force. At the same time, the shell itself and the payload are attracted to the Earth (the shell is approximately 25x15 m in size with a basket and all equipment weighs 400-500 kg, plus passengers: there were twenty people in our basket). The equality of these forces allows the balloon to "hover" in the air at a certain height.
How a balloon is flown
The main control element of a hot air balloon is a gas burner located under the shell and directed upwards. It burns a mixture of propane and butane, which is taken on board in cylinders similar to those that many summer residents have in the kitchen. With the help of fire, the air in the shell is heated; the temperature rises, the ball rises. Depending on the volume of the shell (2-5 thousand cubic meters of air), payload and ambient temperature, the temperature inside is 50-130 degrees Celsius. The air in the shell is constantly cooling down and the ball begins to decline, so you need to periodically “turn on the heat” to maintain a constant height. In general, everything is simple: more fire - we rise, less fire - we maintain altitude, little-little-little-little-little fire - we descend.
However, in order to descend, you can not wait until the air cools down: in the upper part of the shell there is a valve that can be opened and closed with ropes. If you open it, some of the warm air will come out and the ball will fly down.
They take at least two gas cylinders with them (one main, the other spare) - this is enough for about one hour of flight, a variometer for measuring vertical speed and a walkie-talkie for communicating with pilots of other balloons and escort vehicles (more on them below). And, most importantly, there are no sandbags. They are used as ballast on gas balloons (with helium and other similar gases inside), and a hot air balloon is not needed.
The top valve is open, the balloon is deflating. Pay attention to the number. In Turkey, balloons are registered as TC-Bxx, for example, TC-BUM. In Russia, they are registered in the General Aviation Register and have numbers RA-xxxxG. Each balloon has a certificate of airworthiness, everything is as it should be.
Where is the balloon going?
We can only control the vertical speed of the balloon. It flies horizontally wherever the wind takes it. That is why the balloon is unsuitable as a full-fledged vehicle: it is still a pleasure aircraft. Despite this, flights on balloons are regulated by the aviation authorities no less than on airplanes. Each balloon has a registration in the aircraft register and a corresponding number on board, and pilots (there are two of them) - a license. Flights are carried out according to the rules of visual flights, that is, with good visibility, the absence of strong wind is also a prerequisite. The problem is that you can only fly early in the morning at dawn or, conversely, at sunset: during the day, ascending air currents from the earth’s surface heated by the sun make flights unsafe (and there are up and down flows in the morning, just not so strong). So you can easily run into a situation where you arrived, but did not fly anywhere - plan just in case for several days at once!
Each balloon has its own escort vehicle: a jeep with a flatbed trailer the size of a basket. Jeep - because the ball will land, most likely not on the road. Aerobatics is landing directly on the platform; much cooler than putting a fighter on an aircraft carrier.
If the balls collide with each other in the air, then ... nothing happens, they just repel each other and fly further. In general, it is quite difficult for the balls to collide: after all, the wind carries them in the same direction.
How is a hot air balloon flight
First, you are brought to your hot air balloon. At this moment, he is still lying on the ground, the basket is on its side, and with the help of a powerful fan, the shell is filled with air, while simultaneously heating it with a burner. At some point, the limp ball becomes elastic and soars up. The basket is turned over, passengers sit in it, climbing over the side. Inside there are two-point harnesses, which, however, few people use, as well as ropes that you will need to hold on to when landing. The pre-flight briefing, in fact, lies in the fact that when landing, you must definitely sit down and hold on to the ropes, since there is a high probability of the basket tipping over: this will avoid injury.
Flight preparation
The pilot gives more fire, and ... the ball soars smoothly up and to the side. It feels like riding a Ferris wheel, only much higher. And at the same time, there is no noise or vibration, so even seasoned aerophobes are not afraid. And even those who are afraid of heights (and the balloon rises to 1500 m with an average flight altitude of about 500) are not afraid: because of the high (about 1.5 meters) side of the basket, it is impossible to fall out of it, and standing posture provokes to look not down, but to the sides. Indescribable beauty! The real Tatooine! Turkish pilots try to fly in such a way as to get closer to the rocks, "chimneys" and give them the opportunity to see them, descend almost to the roofs of the houses of ancient villages - of course, everything can be photographed and filmed, the main thing is not to drop the camera.
Flight altitude reaches 1500 m
By the way, there is no wind at a height - or rather, it is not felt, because you are flying along with this very wind!
How to fly in a hot air balloon
Cappadocia, as you already understood, is a place where balloon flights are a developed and popular form of recreation. You will need to get to the city of Urgup, which is 70 km from Kayseri, where the nearest civil airport (ASR) is located. There are several daily flights to Kayseri from Istanbul (IST and SAW) by local airlines: Turkish Airlines, Anadolujet, Pegasus Airlines, etc. The flight takes about an hour and a half. Of course, many different airlines fly to Istanbul itself - from Aeroflot and Turkish Airlines to Onur Air and Pobeda. Buying two separate tickets to Istanbul and to Kayseri can help you save a lot (and at the same time spend a couple of days in Istanbul).
Low pass over the mountain - one of the aerobatics in balloons
There are more than a dozen airlines with balloons in Urgup; You can also purchase a flight through their Russian partners by simply typing the appropriate request on Google - it’s convenient if you don’t know Turkish and want to plan everything in advance, or you can directly at the hotel in Urgup, but everything depends on the hotel. Be guided by the fact that the cost of an hour-long flight is 13,000 rubles per person, including transfer from your hotel and back and a modest breakfast in the immediate vicinity of the starting point (tea, coffee, buns).
Video (pre-flight briefing, low-altitude passage, landing on an aircraft carrier, balloon cleaning).
People have been obsessed with the idea of taking to the air for centuries. In the myths of almost all peoples there are legends about flying animals and people with wings. The earliest known flying machines were bird-like wings. With them, people jumped from towers or tried to soar by falling off a cliff. And although such attempts ended, as a rule, tragically, people came up with more and more complex aircraft designs. Iconic aircraft will be discussed in our today's review.
1. Bamboo helicopter
One of the world's oldest flying machines, the bamboo helicopter (also known as the bamboo dragonfly or the Chinese pinwheel) is a toy that flies up when its main shaft is quickly spun. Invented in China around 400 B.C., the bamboo helicopter consisted of feather blades attached to the end of a bamboo stick.
2. Flying flashlight
A flying lantern is a small balloon made of paper and a wooden frame with a hole in the bottom, under which a small fire is kindled. It is believed that the Chinese experimented with flying lanterns as early as the 3rd century BC, but traditionally, their invention is attributed to the sage and commander Zhuge Liang (181-234 AD).
3. Balloon
The hot air balloon is the first successful technology of human flight on a supporting structure. The first manned flight was carried out by Pilatre de Rozier and the Marquis d "Arlande in 1783 in Paris in a balloon (on a leash) created by the Montgolfier brothers. Modern balloons can fly thousands of kilometers (the longest balloon flight is 7672 km from Japan to North Canada).
4. Solar balloon
Technically, this type of balloon flies by heating the air in it with solar radiation. As a rule, such balloons are made of black or dark material. While they are primarily used in the toy market, some solar balloons are large enough to lift a person into the air.
5 Ornithopter
The ornithopter, which was inspired by the flight of birds, bats and insects, is an aircraft that flies by flapping its wings. Most ornithopters are unmanned, but a few manned ornithopters have also been built. One of the earliest concepts for such a flying machine was developed by Leonardo da Vinci back in the 15th century. In 1894, Otto Lilienthal, a German aviation pioneer, made the first manned flight in an ornithopter.
6. Parachute
Made from lightweight and durable fabric (similar to nylon), a parachute is a device used to slow an object through the atmosphere. A description of the oldest parachute was found in an anonymous Italian manuscript dating back to 1470. In modern days, parachutes are used to lower a variety of cargo, including people, food, equipment, space capsules, and even bombs.
7. Kite
Originally built by stretching silk over a split bamboo frame, the kite was invented in China in the 5th century BC. Over a long period of time, many other cultures adopted this device, and some of them even continued to further improve this simple flying machine. For example, kites capable of carrying a person are believed to have existed in ancient China and Japan.
8. Airship
The airship became the first aircraft capable of controlled takeoff and landing. In the beginning airships used hydrogen, but due to the high explosiveness of this gas, most airships built after the 1960s began to use helium. The airship may also be powered and the crew and/or payload located in one or more "nacelles" suspended below the gas cylinder.
9. Glider
Glider - an aircraft heavier than air, which is supported in flight by the dynamic reaction of air on its bearing surfaces, i.e. it is independent of the engine. Thus, most gliders do not have an engine, although some paragliders can be equipped with one to extend the flight if necessary.
10 Biplane
Biplane - an aircraft with two fixed wings, which are located one above the other. Biplanes have a number of advantages over conventional wing designs (monoplanes): they allow for more wing area and lift with a smaller wingspan. The Wright brothers' biplane in 1903 became the first aircraft to successfully take off.
11. Helicopter
A helicopter is a rotary-wing aircraft that can take off and land vertically, hover and fly in any direction. There have been many concepts similar to today's helicopters over the past centuries, but it wasn't until 1936 that the first operational Focke-Wulf Fw 61 helicopter was built.
12. Aerocycle
In the 1950s, Lackner Helicopters came up with an unusual flying machine. The HZ-1 Aerocycle was intended to be operated by inexperienced pilots as the standard reconnaissance vehicle in the US Army. Although early testing indicated that the vehicle could provide sufficient mobility on the battlefield, more extensive evaluations indicated that it was too difficult for untrained infantrymen to control it. As a result, after a couple of accidents, the project was frozen.
13. Kaitun
Kaitun is a hybrid of a kite and a hot air balloon. Its main advantage is that the kaitoon can remain in a fairly stable position above the anchor point of the line, regardless of the strength of the wind, while conventional balloons and kites are less stable.
14. Hang glider
A hang glider is a non-motorized, heavier-than-air aircraft that lacks a tail. Modern hang gliders are made of aluminum alloy or composite materials, and the wing is made of synthetic canvas. These vehicles have a high lift ratio, which allows pilots to fly for several hours at an altitude of thousands of meters above sea level in the rising currents of warm air and perform aerobatics.
15. Hybrid airship
A hybrid airship is an aircraft that combines the characteristics of a lighter-than-air vehicle (i.e. airship technology) with a heavier-than-air vehicle technology (either a fixed wing or a rotary propeller). Such designs were not put into mass production, but several manned and unmanned prototypes appeared, including the Lockheed Martin P-791, an experimental hybrid airship developed by Lockheed Martin.
16. Airliner
Also known as a jet airliner, a jet airliner is a type of aircraft designed to carry passengers and cargo through the air that is propelled by jet engines. These engines enable the aircraft to achieve high speeds and generate enough thrust to propel large aircraft. Currently, the Airbus A380 is the world's largest jet airliner with a capacity of up to 853 people.
17. Rocket plane
A rocket plane is an aircraft that uses a rocket engine. Rocket planes can achieve much higher speeds than similarly sized jet aircraft. As a rule, their engine runs for no more than a few minutes, after which the plane glides. The rocket plane is suitable for flying at very high altitudes, and it is also capable of developing much higher acceleration and has a shorter takeoff run.
18. Float plane
It is a type of fixed wing aircraft capable of taking off and landing on water. The buoyancy of the seaplane is provided by pontoons or floats, which are installed instead of the landing gear under the fuselage. Float planes were widely used until the Second World War, but then they were replaced by helicopters and aircraft used from aircraft carriers.
19. Flying boat
Another type of seaplane, the flying boat, is a fixed-wing aircraft with a hull shaped to allow it to land on water. It differs from a floatplane in that it uses a specially designed fuselage that can float. Flying boats were very common in the first half of the 20th century. Like floatplanes, they subsequently fell into disuse after World War II.
Also known by other names (for example, cargo aircraft, freighter, transport aircraft, or cargo aircraft), a cargo aircraft is a fixed-wing aircraft designed or converted to carry goods rather than passengers. At the moment, the An-225 built in 1988 is the largest and most lifting in the world.
21. Bomber
Bomber - a combat aircraft designed to attack land and sea targets by dropping bombs, launching torpedoes or launching air-to-ground cruise missiles. There are two types of bombers. Strategic bombers are primarily designed for long-range bombing missions - i.e. to attack strategic targets such as supply bases, bridges, factories, shipyards, etc. Tactical bombers are aimed at countering enemy military activities and supporting offensive operations.
22. Spaceplane
A spaceplane is an aerospace vehicle that is used in the Earth's atmosphere. They can use both rockets alone and auxiliary conventional jet engines. Today there are five such vehicles that have been successfully used: X-15, Space Shuttle, Buran, SpaceShipOne and Boeing X-37.
23. Spaceship
A spacecraft is a vehicle designed to fly in outer space. Spacecraft are used for a variety of purposes, including communications, earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of people and goods.
A space capsule is a special type of spacecraft that has been used in most manned space programs. A manned space capsule must have everything you need for daily life, including air, water and food. The space capsule also protects astronauts from the cold and cosmic radiation.
25. Drone
Officially known as an unmanned aerial vehicle (UAV), the drone is often used for missions that are too "dangerous" or simply impossible for humans. Initially, they were used mainly for military purposes, but today they can be found literally everywhere.
The arrival of summer in some hot corners of our planet brings with it not only exhausting heat, but also flight delays at airports. For example, in Phoenix, Arizona, the air temperature recently reached +48°C and airlines were forced to cancel or reschedule over 40 flights. What is the reason? Don't planes fly in the heat? They fly, but not at any temperature. According to media reports, the heat is a particular problem for Bombardier CRJ aircraft, which have a maximum take-off operating temperature of +47.5°C. In the same time, large aircraft from Airbus and Boeing can fly at temperatures up to +52°С degrees or so. Let's take a look at the reasons for these restrictions.
lift principle
Before explaining why not every plane is able to take off at high air temperatures, it is necessary to understand the very principle of how airplanes fly. Of course, everyone remembers the answer from school: "It's all about the lift of the wing." Yes, this is true, but not very convincing. To really understand the laws of physics that are involved here, you need to pay attention to law of momentum. In classical mechanics, the momentum of a body is equal to the product of the mass m of this body and its speed v, the direction of the momentum coincides with the direction of the velocity vector.
At this stage, you might think that we are talking about changing the momentum of the aircraft. No, instead consider the change in air momentum incident on the wing plane. Imagine that each air molecule is a tiny ball that hits an airplane. Below is a diagram that shows this process.
The moving wing collides with balloons (that is, air molecules). The balls change their momentum, which requires the application of force. Since the action is equal to the reaction, the force that the wing exerts on the air balloons is of the same magnitude as the force that the balloons themselves exert on the wing. This leads to two results. First, the lifting force of the wing is provided. Secondly, there is a reverse force - thrust. You can't reach the lift without pulling.
In order to generate lift, the plane must move, and in order to increase its speed, you need more thrust. To be more precise, you need exactly the right amount of thrust to balance the force of air resistance - then you fly at the speed you want. Typically, this thrust is provided by a jet engine or a propeller. Most likely, you could even use a rocket engine, but in any case - you need a thrust generator.
What is the temperature here?
If the wing collides with just one ball of air (i.e. a molecule), this will not lead to much lift. It takes a lot of collisions with air molecules to increase lift. This can be achieved in two ways:
- move faster, increasing the number of molecules that come into contact with the wing per unit time;
- design the wings more surface area, because in this case the wing will collide with a large number of molecules;
- Another way to increase the contact surface area is to use a larger angle of attack due to the tilt of the wings;
- finally, a greater number of collisions of the wing with air molecules can be achieved if air density is higher, that is, the number of molecules themselves per unit volume is greater. In other words, an increase in air density increases lift.
This conclusion brings us to air temperature. What is air? This is a set of microparticles, molecules that move right around us in different directions and at different speeds. And these particles collide with each other. As the temperature rises, the average speed of the molecules also increases. An increase in temperature leads to expansion of the gas, and at the same time - to a decrease in air density. Remember that heated air is lighter than cold air, it is on this phenomenon that the principle of aeronautics of hot air balloons is built.
So, for more lift, you need either a higher speed, or a larger wing area, or a larger angle of attack of the molecules on the wing. Another condition: the higher the air density value, the greater the lifting force. But the reverse is also true: the lower the air density, the lower the lift. And this is true for hot corners of the planet. Due to the high temperature, the air density is too low for some aircraft, it is not enough for them to take off.
Of course, you can compensate for the decrease in air density by increasing the speed. But how can this be done in reality? In this case, it is necessary to install more powerful engines on the aircraft, or increase the length of the runway. Therefore, it is much easier for airlines to simply cancel some flights. Or, at least, move it to the evening, early morning, when the ambient temperature is below the maximum allowable limit.
Municipal budgetary preschool educational institution "Kindergarten No. 4"
Experimental search activity
"Why can birds fly?"
Kirillova Kristina Gennadievna,
caregiver
Bolkhov, 2016
Target: find out why birds can fly?
Program content:
Consolidate children's knowledge about birds.
Activate the dictionary, due to the words: pen, rod, fan, flywheel, downy.
Develop long-term memory, thinking, auditory perception, fine motor skills of hands.
To develop in children such ways of knowing as observation, experimentation, comparison and comparison, analysis, reasoning and inference.
To cultivate a careful, caring attitude towards nature, love and kindness to birds.
preliminary work: bird watching; viewing illustrations; reading fiction; artistic creativity (sculpting, application, manual labor); didactic game: "Migratory and wintering birds").
Material: a tape recorder, a candle, a lighter, poplar fluff, plastic cups, paper napkins, basins of water, soap bubbles for all children, sheets of paper for all children, 2 pieces each, trays, zippers, bird feathers (fly, down), magnifiers.
Lesson progress
Children sit on the couch and play a finger game.
Finger game: bird feeder
We hung feeders
They were filled with grain.
For hungry birds in winter
It is very tasty.
Come to us, tits,
Dove, crossbill and sparrow!
(Children's answers: 4 birds).
Educator: - What groups are the birds divided into? (migratory, wintering, nomadic). Educator: - What kind of migratory birds do you know? (After the children's answers, show a poster)
MIGRATORY BIRDS
The main reasons why birds fly south in winter are lack of food and cold. So, among the inhabitants of forests and settlements, about half of the species are migratory, and among the inhabitants of fields, swamps, reservoirs - almost all species. migratory there are more birds among insectivores and carnivores, less among granivorous ones. This is understandable: if grain can still be found in winter, then there are no insects at all.
Educator: - What are the wintering and nomadic birds? Educator: - That's right, well done! (poster display)
WINTERING AND Wandering Birds
Educator: How does a person help birds? (feeds birds, hangs feeders, builds birdhouses in spring). Educator: - What do birds eat? (grain, crumbs, berries, insects) Educator: - How do birds move? (flying, jumping, walking). Educator: - A person also walks and can jump, but can he fly? (no, a person cannot fly). Educator: - Why, then, can birds fly, but humans cannot? Do you want to know? (Yes!) Educator: - Where do birds fly? (Children's answers: through the sky, through the air). Educator: - Birds fly through the air, but does it exist? Let's try with you to find out if there is air. Go to the laboratory. (Children move to the tables).
Experience 1: On the table are plastic cups, paper napkins, basins of water.
Educator: - Check the napkin, what kind of napkin do you have dry or wet? (Children's answers: dry). Educator: - Crumple the napkin in your fist and put it on the bottom of the glass. - To prove that there is air, turn the cup upside down and quickly lower it into the water. (Children perform). Educator: - And now take the glass out of the water and check the napkin? What kind of wipes do you use, dry or wet? (Children's answers: dry). Educator: - Why do you have a dry napkin? (Children's answers: there was air there, he did not let the napkin get wet).
CONCLUSION: there is air, birds fly through the air.
Educator: - So we proved that there is air. Can we see air? Can we feel it? (Children's answers: no, we don't see. We can't feel).
Experience 2 : There is a candle and a lighter on the table. The teacher lights a candle. Educator: holds a lit candle in his hands. - Swipe your palm over the candle, under the candle? (Children follow instructions). - What is the air above the candle? (warm). Educator: - What is the air under the candle? (Children's answers: cold). Educator: - Tell me, what is the air like outside? What about indoors? Educator: - Can we feel the air? (Yes!)
CONCLUSION: The air can be felt. The air can be warm or cold.
Fitness minute. To the music, an outdoor game is held: “Birds in nests.
Educator: - Guys, pay attention, does the air prevent us from making movements? (No). Educator: - Can he help us? Let's check. Experience 3: Take poplar fluffs and blow on them. Children take fluff and blow on them. Teacher: What is happening to her? (Children's answers: a fluff flies). Teacher: What did we do? - What fluff? (Children's answers: We blew air on a fluff, it is light, it can fly).
Experience 4: Educator: - Take bubbles and blow them. (Children blow bubbles). Educator: - What is inside the bubble? - What bubble? (Children's answers: there is air inside the bubble, the bubble is light). Educator: - What happens to the bubble? (Children's answers: the bubble flies because it is light). Educator: What objects does air help? (Children's answers: air helps light objects fly). Educator: - What can we conclude?
CONCLUSION: Air helps light objects fly, which means the bird is light. Experience 5: Educator: - When the bird flies, what does it do? (Children's answers: she opens her wings). Imagine that a sheet of paper is open wings, and a crumpled sheet is folded wings. (The teacher takes a sheet of paper, crumples it and throws a crumpled sheet and not crumpled, the children do the same). Educator: - Which sheet of paper flies longer? Why? (Children's answers: not a crumpled sheet of paper flies longer, but a crumpled one immediately falls. Educator: - What can we conclude?
CONCLUSION : Spread wings help the bird to fly, if the bird closes its wings, it will immediately fall to the ground like a stone. Educator: - What is the body of birds covered with? (Answers of children: the body of birds is covered with feathers). Educator: - Do they help her? Let's make sure.
Experience 6: (Children sit at the tables). Educator: - You have bird feathers on the trays. Take a big feather. This feather is called a fly feather. It is necessary for the bird to fly. Educator: -Wave to them. What happens to the hairs on the feather, do they diverge or not? (Children's answers: the hairs on the feather are closed). Educator: - You hold the pen by the rod, the rod of the pen is hollow, look (shows) there is air in it, and waves it - a fan (closed hairs).
Experience 7: Educator: - Take the zipper, unzip it and fasten it. In a bird, all the hairs of a feather are connected like teeth on a zipper. Educator: - Take a magnifying glass and examine the pen under the magnifying glass. (Answers of children: you can see the teeth on the hairs). Educator: - Take another feather. How does it differ from flywheel? (Answers of children: the hairs are not closed, it is fluffy, like fluff). Educator: - Take a magnifying glass and examine the feather under the magnifying glass. This feather is called downy. It is necessary for the bird to keep warm. Educator: - Are there teeth on this feather? (Children answer: no). Educator: - Compare the feathers. What are they? (Children's answers: the fly feather is long, the down feather is short, they are light, there is air in the core of the feathers). CONCLUSION: The longer the flight feather, the wider the wingspan, the bird will fly longer. The core of the feathers is filled with air. Feathers help the bird to be light.
TOTAL: We learned why birds can fly:
- the air helps the bird,
- light bird,
- the wider the wings, the longer and higher the bird can fly.
Literature: Dybina O. V. "A child in the world of search." M., 2007; Dybina O. V., Rakhmanova N. P., Shchetinina V. V. "Unexplored nearby: entertaining experiments and experiments for preschoolers." M, 2001; Kolomina N.V. "Education of the basics of ecological culture in kindergarten: lesson scenarios." M., 2004; Gorkova L. G., Kochergina A. V., Obukhova L. A. "Scenarios for classes on environmental education of preschoolers: middle, senior, preparatory groups." M., 2005; E. Motylyova «The Big Book of Experiments for Preschoolers». M., 2003; V. Zhukova, Cognitive Experiences at School and at Home. M., 2002; Zarinova A. "Elementary search activity in kindergarten" // Preschool education. 1994. No. 7; Organization of experimental activities of preschoolers. M., 2004
