Ten of the most unusual and amazing natural phenomena. Presentation "natural phenomena" presentation for a lesson on the world around us on the topic
The polar (northern) lights are one of the most beautiful optical phenomena in the world, which can be observed exclusively at high latitudes, near the poles. Typically, auroras are bluish-white, and only in exceptional cases can multicolored auroras be observed. Aurorae appear as a result of bombardment upper layers atmosphere by charged particles moving towards the Earth along the geomagnetic field lines from the near-Earth region outer space. The Northern Lights can last from several hours to several days and amaze with their extraordinary beauty.
Any lightning is electricity, which, depending on conditions, can take various shapes. Especially amazing are ball lightning, which used to be called fireballs. The nature of the occurrence of ball lightning is still not precisely known. Sometimes they were even observed inside houses and airplanes. The behavior of ball lightning has also not been studied. Ball lightning can be fiery red, orange or yellow and float in the air for several seconds until it disappears. Lightning is always accompanied by thunder and a bright flash of light and is most often observed during a thunderstorm. Each of us has repeatedly seen ordinary, so-called linear lightning. And here ball lightning- a rather rare phenomenon. In nature, there are about a thousand ordinary ones, linear lightning there are only 2-3 balls.
We are all used to seeing the ordinary moon, but sometimes when the atmosphere is dusty, high humidity or for other reasons, the Moon appears to have different colors. The blue and red Moon are especially unusual. A blue moon is such a rare natural phenomenon that the British even have a saying “once in a blue moon,” which means about the same as our “after the rain on Thursday.” The blue moon appears from ashes and burning. For example, when forests burned in Canada, the moon was blue for a whole week.
"Fiery rain ( star Rain) In fact, it is not stars that fall from the sky, but meteorites that enter earth's atmosphere, heat up and burn. In this case, a flash of light appears, which is visible at a fairly large distance from the surface of the Earth. Most often, a meteor shower of high intensity (up to a thousand meteors per hour) is called a star or meteor shower. A meteor shower consists of meteors that burn up in the atmosphere and do not reach the ground, but meteor Rain- consists of meteorites that fall to earth. Previously, the former were not distinguished from the latter, and both of these phenomena were called “rain of fire.” Interesting fact: every year, the mass of the Earth increases by an average of 5 million tons from meteorite fragments and cosmic dust.
Despite their prevalence, mirages always evoke an almost mystical sense of wonder. We all know the reason for the appearance of most mirages - overheated air changes its optical properties, causing light irregularities called mirages. A mirage is a phenomenon that has long been explained by science, but continues to amaze people. The optical effect is based on a special vertical distribution of air density. Under certain conditions, this leads to the appearance of virtual images near the horizon. However, you instantly forget all these boring explanations when you yourself become a witness to a miracle being born before your eyes.
Lenticular mammatus is a rare meteorological phenomenon. This photo was taken in Joplin, Missouri. Early morning Joplin residents could see these crazy clouds in the sky. Clouds called "lenticular mammatus" are quite rare. The last such occurrence was recorded in this area about 30 years ago.
St. Elmo's Fire is a very beautiful and unusual natural phenomenon. The first witnesses to this phenomenon were sailors who observed St. Elmo's lights on masts and other vertical pointed objects. These are very beautiful luminous balls that appear from high electric field strength, for example, during a thunderstorm, blizzard or strong storm. Sometimes it happened that St. Elmo's Fire disabled electrical and radio devices.
If you light a fire in the mountains at night under low clouds, your shadow will appear on the clouds and you will have a luminous halo around your head. This phenomenon is called Gloria. Gloria is optical phenomenon, which is observed on clouds located directly in front of or below the observer, at a point directly opposite the light source. In China, Gloria is called "Buddha's light." A colored halo always surrounds the shadow of the observer, which was often interpreted as the degree of his enlightenment (closeness to Buddha and other deities).
The round-horizontal arc, which is called a fire rainbow for its resemblance to flame, is created by ice, not fire. For a fire rainbow to occur, the Sun must rise above 58 degrees above the horizon and there must be cirrus clouds in the sky. Additionally, the numerous flat, hexagonal ice crystals that make up cirrus clouds must be positioned horizontally to refract sunlight like one giant prism. Therefore, a fiery rainbow can be seen very rarely, but such a phenomenon looks very fascinating in the sky.
At dusk, shortly before sunrise or just after sunset, the sky above the horizon is partly colorless and partly pinkish. This phenomenon is called the belt of Venus. A colorless strip between the already darkened sky and blue sky can be seen everywhere, even to the side opposite the Sun. The blueness of the sky is due to the reflection of sunlight in the atmosphere. The phenomenon of the belt of Venus is explained by the reflection in the atmosphere of the light of the setting (or rising) Sun, which appears reddened. The Belt of Venus is visible anywhere if the horizon is clear. In the picture you see the belt of Venus, photographed in the Moon Valley, covered with morning fog
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Presentation on the topic “Natural phenomena”
Natural phenomena Seasons Test yourself CONTENTS
The sun warms up, the snow melts, streams run, leaves bloom, the grass turns green, insects appear and return. migratory birds. The days are getting longer. Animals sleeping in winter wake up and bask in the warm spring sun. Birds begin to build nests. SPRING
Warm, green plants, flowers, fruits and berries are ripening, butterflies are flying and beetles are crawling. The days are getting long. The water in the river is warm and you can already swim. The sun is very warm. SUMMER
The days are short and rainy, the nights are long and cold. Leaves of trees and shrubs fall, grass withers, insects disappear, and migratory birds fly away to hot countries. People are harvesting. AUTUMN
When does this happen? The low sun shines, but does not warm. All the trees are covered with silver sparkling in the cold rays of the sun. Children in warm fur coats and fur hats ride down a high mountain. summer m 2) autumn u; 3) in winter; 4) in the spring. The gentle sun is shining brighter and warmer. Primroses bloom in thawed patches. Forest animals more often leave their homes in search of food. Very soon the hazel and willow will bloom their earrings. 1) summer m; 2) autumn; 3) in winter; 4) in the spring.
When does this happen? The biggest holidays have arrived. The hot sun is shining. In a forest clearing, fragrant strawberries are hidden under the leaves. The whole forest is filled with bird trills. In the fields, daisies sway with yellow eyes with white eyelashes. in winter; 2) in spring; 3) summer m; 4) autumn The days are getting shorter. The sun shines less often. Trees drop their bright outfits into puddles. Cold winds blow more often. Drizzling rain forces children to stay at home. Passers-by on the street raise their coat collars. Sometimes the rain turns into sleet. 1) in winter; 2) in spring; 3)
Hello, dear friends, today I would like to introduce you to the extraordinary wonders with which our planet has surprised us for thousands of years.
Tell me, what planet do we all live on? (Earth). Beautiful planet! I invite everyone present to look at the photo of the Earth.
Slides No. 2-11 – views of the Earth from space (automatically, to the song “Earthlings” “Grass at the House”).
Very beautiful, really! Our planet is full of surprises, we call them natural phenomena, many of them we see every day. I ask you to guess riddles about them.
Runs through the grove -
Washes and rinses
She ran along the meadow -
The shepherdess gave him a bath.
(Cloud)
No one sees me, but everyone hears, and everyone can see my companion, but no one hears.
(Thunder and lightning)
And not snow, and not ice, but with silver he will remove the trees.
(Frost)
There is a commotion in the yard: peas are falling from the sky.
Inna ate six peas and now has a sore throat.
(hail)
The milk floated over the river, nothing was visible.
The milk dissolved and it became visible far away.
(Fog)
For a minute, a multi-colored miracle bridge grew into the ground.
The miracle worker made a high bridge without railings.
(Rainbow)
They fly without wings, they run without legs, they swim without sails.
(Clouds)
He's flying down the cliff
breaks on the stones.
He roars louder than a beast,
and turns into foam.
(Waterfall)
Without language, no one sees it, but everyone hears it.
(Echo)
The white dog is looking into the gateway.
(Snowdrift)
Near the village the horse is cheerful.
(Blizzard, blizzard)
(Remaining slides by clicking).
Slide No. 12Mirages
Despite their prevalence, mirages always evoke an almost sense of wonder.Mirage (French mirage - literally visibility) is an optical phenomenon in the atmosphere: a connection of light streams at the border of different layers of air: hot and cooler. For an observer, this phenomenon consists in the fact that along with a really visible distant object (for example, a piece of sky), its reflection in the air is also visible.
Slide No. 13Halo
Typically, halos occur when there is high humidity or severe frost- Previously, the halo was considered a phenomenon from above, and people expected something unusual.
Halos typically appear around the Sun and Moon, sometimes around other powerful light sources such as street lights. The halo is caused by ice crystals in clouds at an altitude of 5-10 km. The type of halo depends on the shape and arrangement of the crystals. Sometimes the halo looks like a rainbow.
Slide No. 14Moon Rainbow
We are almost used to the usual rainbow. The lunar rainbow is much more a rare event than a rainbow, which is visible in daylight. A lunar rainbow can only appear in places with high humidity and only when the Moon is almost full.
A night rainbow (or lunar rainbow) is light that is reflected from the surface of the Moon. A lunar rainbow is a very rare natural phenomenon. If observed with the naked eye, it may appear colorless, which is why it is often called “white.” There are several places in the world where the phenomenon of night rainbows occurs quite often.The photo shows a moonbow at Cumberland Falls in Kentucky.
Slide No. 15Belt of Venus
An interesting optical phenomenon that occurs when the air is dusty is an unusual “belt” between the sky and the horizon.
Slide No. 16Pearl clouds
Unusually high clouds (about 10-12 km), becoming visible at sunset.
Slide No. 17Northern lights
(video no. 1 Northern Lights)
Appears when energetically charged particles collide with the Earth's atmosphere.
Slide No. 18- 19Colored Moon
Colored moon. Our satellite sometimes looks like this due to the presence of smoke, dust in the atmosphere, and also during eclipses.
When the atmosphere is dusty, high humidity, or for other reasons, the Moon sometimes appears colored. The red Moon is especially unusual.A blue moon is an incomparably rarer phenomenon than a red one.
Slide No. 20Lenticular clouds
An extremely rare phenomenon, appearing mainly before a hurricane. Opened just 30 years ago.
Slide number 21St. Elmo's Fire
A fairly common phenomenon caused by increased electric field strength before a thunderstorm, during a thunderstorm and immediately afterand in winter during snowstorms.The first witnesses to this phenomenon were sailors who observed St. Elmo's lights on masts and other vertical pointed objects.
St. Elmo's fire is an electrical discharge in the form of luminous beams that appears at the sharp ends of tall objects (towers, masts, lonely standing trees, sharp tops of rocks, etc.).
The phenomenon received its name from St. Elmo, the patron saint of sailors. For sailors, the appearance of lights promised hope for success, and in times of danger, for salvation.
Slide number 22Light pillars .
The nature of these phenomena is similar to the conditions that cause the appearance of a halo.
Slide number 23Diamond dust
Frozen water droplets scattering the light of the Sun.
Slide number 24Fire rainbow.
Occurs when passing sun rays through high clouds.
Video No. 2 Tornado Fire whirlwinds
A beautiful, dangerous and rare natural phenomenon. They appear at a certain combination of air direction and temperature. The flame can rise up tens of meters, thus forming something like a fire tornado.
Slide number 25Green beam .
An extremely rare phenomenon that occurs at sunset or sunrise.
Green beam - flash green light at the moment the solar disk disappears below the horizon (usually the sea) or appears from behind the horizon.
In order to observe the green beam, three conditions are necessary: an open horizon (in the steppe, tundra, mountains or at sea in the absence of waves), fresh air and the side of the horizon, free from clouds, where sunset or sunrise occurs. Observation with the naked eye is quite rare. Using a telescope, telescope, binoculars, and pointing the device at the sunrise in advance, you can see it almost any day in suitable weather. You can watch no more than a few seconds - it’s dangerous! When the Sun sets, its bright light does not allow the use of optics at all.
The normal duration of the green beam is only a few seconds.
Slide number 26Crawling stones
This amazing action that takes place in Death Valley has been troubling the minds of scientists who are trying to create a description of natural phenomena for several decades. Huge boulders crawl by themselves along the bottom of the lake. At the same time, no one touches them, but they still crawl. No one has ever seen exactly how they move. At the same time, they persistently move, as if alive, sometimes turning over on their side, while leaving deep traces behind them that stretch for several meters. Periodically, the stones draw such complex and unusual lines that they turn over, doing somersaults as they move.
Video No. 3 (7 unusual natural phenomena).
Our exciting activity has come to an end. I hope you learned a lot today about the wonders of our planet.
Natural phenomena
Icicles
Snowfall
Natural phenomena
Natural phenomena Dangerous not dangerous One of the most dangerous natural phenomena is a thunderstorm. It is accompanied by lightning, thunder, gusty winds, and downpours. Lightning is an electrical discharge between a cloud and the ground. Lightning can set a tree, a house on fire, and even kill a person. During a thunderstorm, the worst thing seems to be thunder. But thunder is not dangerous to humans, lightning is dangerous. Snowfall is precipitation that falls in the form of snow in winter. At high altitudes, the vapor in the snow clouds begins to freeze and turns into small ice crystals. These crystals make snowflakes. Rain is precipitation that falls in the form of water droplets. The water droplets in the clouds become too heavy and begin to fall to the ground. If the drops are small, it is drizzling, and if they are large, it is torrential. Very strong pouring rain called a downpour.
- After rain, a multi-colored arc - a rainbow - may appear in the sky.
- Why does it occur?
Fog is a cloud near the surface of the earth. There is no difference between fog and cloud in the sky.
Ice is frozen water, water in solid state. When warm, ice turns into water (melts). Frost is very small crystals that look like tiny snowflakes. Most often, frost falls on cold, clear and quiet nights. It is formed in calm weather and with a light breeze and covers the ground, plants, stones, walls of houses and benches... Thawed water flows down and hangs in drops from the edge, cools and freezes. The frozen drop is followed by the next one, which also freezes, then a third drop, and so on. Gradually, a small ice tubercle forms - this is how icicles are formed. When raindrops rise and fall in a vortex of cold air, freezing more and more, hail forms. And no longer drops fall to the ground, but solid balls. From the Guinness Book of Records:
- The largest hailstone (1 kg) fell in Bangladesh in 1986.
- The largest raindrops measuring 10 mm fell in the USA in 1953.
- Most long rain ran in India from August 1960 to July 1961.