"Sphere and ball" - The tale of the emergence of the ball. Any section of a sphere by a plane is a circle. Astronomical observations of the firmament invariably evoke the image of a sphere. Presentation Sphere and ball. Definition. The scope has always been widely used in various fields of science and technology. The section passing through the center of the ball is a great circle. (diameter section).
"Geometry Sphere and ball" - Historical reference: Egyptian pyramids. Dandelin Germinal Pierre (04/12/1794 - 02/15/1847). Two meanings: Learned about the application of knowledge about inscribed balls. 4) The volume of the pyramid. Essay on geometry. 6) The volume of the ball is found by the following formula: The abstract presents definitions, theorems and corollaries from the theorems on inscribed balls and spheres.
"Circumference circle sphere ball" - What is the volume of such a ball? Radius. By analogy with a circle, explain what is: a) radius; b) chord; c) the diameter of the sphere. Wheel. Ball. Circumference. The center of the ball (sphere). Area of a circle. Find the surface area of a sphere with a radius of 3m. We choose the value of R with an accuracy of 1 cm. Ball and sphere. Diameter. Circle.
"Balloons" - Goose dry! What will the bunny answer to the horse? Why can the ball lose height? How will the sediment of a piece of ice change? Determine Fout. Sailing ships. As a result, the dog landed safely! Why is the shell size so big? Determine the buoyant forces in both cases. Hot air balloon start.
"Ball 11 class" - Sphere and ball in people's lives. Astronomical observations of the firmament invariably evoke the image of a sphere. From the history of occurrence. Formula for the area of a sphere and a sphere. History of creation. In ancient times, the sphere was held in high esteem. The scope has always been widely used in various fields of science and technology. The radius of the ball is 13 cm.
"Cylinder cone ball" - Bodies of revolution. Sections of a cylinder. - Ball segments. Section of a cone. Definition of a cylinder. The volume of the spherical segment. Task number 3. Segment volume. Find the volume and surface area of the sphere. The cross section of a cylinder with a plane parallel to the bases is a circle. Types of bodies of revolution. The section of a sphere by a plane is a circle.
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At the webinar, you will get acquainted with affordable and interesting ways to increase the involvement of parents in the work of the meeting. The participation of parents can be not only passive, but sometimes protest opinion of the teacher. Create conditions, use soft forms of invitation to activities and find like-minded people in the face of parents.
Some lessons may seem boring to children. And then discipline begins to suffer in the classroom, students quickly get tired and do not want to take part in the discussion. Case Lessons were created to connect educational school knowledge with urgently needed competencies, such as creativity, systemic and critical thinking, purposefulness, and others. Thanks to the cases, you can help the student to benefit and enjoy learning, to cope with his personal problems!
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If you are a teacher, then of course you wondered: what books do you need to read in order for work to bring joy and satisfaction? Undoubtedly, now you can find a lot of information on this issue on the Internet. But such diversity is very difficult to understand. Finding out which books will really help you will take a lot of time. In this article, you will learn about what books every teacher should read.
The visibility of the material motivates children elementary school to the solution of the educational problem and maintains interest in the subject. Therefore, one of the most effective methods learning is the use of flashcards. Cards can be used in teaching any subject, including in circle activities, and in extracurricular activities. For example, the same cards with vegetables and fruits are suitable for teaching counting in mathematics lessons, and for studying the topic of wild and garden plants in the lessons of the world around.
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Workshop for junior schoolchildren"Globe on the table" Goals and objectives: acquaintance with the history of the appearance and use of the globe and geographical maps; development of learning motivation, logical thinking and the ability to solve simple logical problems. Equipment: desktop globes, different kinds physical maps, atlases. The teacher tells the children about the globe.
And in ancient times, people traveled little: there was no modern transport, moreover, they did not even know where to go. Our distant ancestors knew little about the planet Earth on which we live. Over time, they learned to build small boats first, and then ships that could go on distant journeys across the seas and oceans. These wanderings continued for many days and nights. How did the sailors not go astray? What helped them travel? (Answers-assumptions of children.) In those distant times that I am telling you about, navigators were guided by the stars. But the stars appear only at night and only in good weather. During daylight hours and in bad weather, travelers were helped by a globe. Not a single ship set sail without a globe. What is a globe, do you know? (Children's answers. The teacher demonstrates a globe; children examine it.) Look - this is the globe of our planet Earth. The globe was invented and made by people. Looking at the globe, we can learn a lot about our planet. For example, what shape is the Earth? Does it have dry land? Is there a lot of water on our planet? There are very interesting globes in the world. The largest of them was made in France. Our whole group could fit inside it (the diameter of the globe is 13 meters). This globe is very heavy, weighing as much as a modern bus. Our country also has amazing globes. One of them is located in St. Petersburg. Globe diameter - 3 meters; he was taken out of Germany by Peter the Great; on his outer surface- a map of the Earth, and on the inside - a starry sky. Another large globe can be seen in Moscow, on the site in front of the planetarium. Nowadays, they make a wide variety of globes. One of them is in front of you. And now I will show you the place where we live (show). This year we will learn a lot more about our planet: and the globe will help us in this. .
Photo of a globe in Moscow in front of the planetarium
Globe of Peter the Great
The giant ball, created back in 1998, is exhibited in the spacious pavilion of the DeLorme headquarters in Yarmouth, USA.
People started making maps a long time ago, and these maps were different. So, the inhabitants of one of southern islands maps were woven from dried leaves, and villages, rivers, mountains, sea routes were marked with shells, which were attached to a wicker base. They valued their maps very much, they never took them with them on sea voyages, so as not to lose or damage them during a storm. The islanders, before setting off, memorized the map. Now maps are applied to paper. People did not immediately create a map of the world, because in ancient times they did not know the planet on which they lived. It took many, many years. A map is an image, a drawing, on which all the features of the area are represented with the greatest accuracy: lands, countries, cities
Background The shape of the Earth - our home - has been worrying humanity for a long time. Today, every student has no doubt that the planet is spherical. But it took a long time to get to this knowledge, they went through church anathemas and the courts of the Inquisition. Today people are wondering who proved that the Earth is round. After all, not everyone liked the lessons of history and geography. Is the earth round? Different peoples had their own ideas about the structure of the world and space. Before answering the question of who proved that the Earth is round, you should familiarize yourself with other versions. The earliest theories of world-building claimed that the earth was flat (as it was seen by people). They explained the movement of heavenly bodies (sun, moon, stars) by the fact that it was their planet that was the center of the Cosmos and the Universe. IN Ancient Egypt The earth was represented by a disk lying on four elephants. They, in turn, stood on a giant turtle floating in the sea. The one who discovered that the Earth is round has not yet been born, but the theory of the sages of the pharaoh could explain the causes of earthquakes and floods, the rising and setting of the sun. The Greeks also had their own ideas about the world. The earthly disk in their understanding was covered with celestial spheres, to which stars were tied with invisible threads. They considered the moon and the sun to be gods. Science and the Church The Vatican recognized that the Earth is round rather late. When it was impossible to deny the obvious. Early European writers at first dismissed this theory as contradicting Scripture. At the time of Cosmas, Indikopleust described the Earth as a kind of box, at the bottom of which rested a stronghold inhabited by people. The sky served as a "lid", but it was motionless. The moon, stars and sun moved like angels across the sky and hid behind high mountain. Above this complex structure rested the Kingdom of Heaven. Some unknown geographer from Ravenna described our planet as a flat object, surrounded by an ocean, an endless desert and mountains, behind which the sun, moon and stars are hiding.
The fact that the earth is round was said by Pythagoras, however, Galileo Galilei was the first to prove this theoretically. , the purpose of which was to circumnavigate the entire globe. Magellan himself at that time was not yet sure of the happy end of the voyage, since the idea of the spherical shape of the Earth was only a theoretical assumption, but the journey ended successfully - and it was proved that the Earth is round.
The first round-the-world expedition of Magellan 1519-1522. Of the 265 people who on September 20, 1519 went to trip around the world under the leadership of Magellan, only 18 sailors returned on September 6, 1522 on the last of the ships, sick and exhausted. Instead of honors, the team received a public repentance for one lost day as a result of moving through time zones around the Earth in a westerly direction. So Catholic Church punished the heroic team for a mistake in celebrating church dates.
Going out into the street and looking around, anyone can be convinced: the Earth is flat. There are, of course, uplands and depressions, mountains and ravines. But on the whole it is clearly visible: flat, sloping along the edges. The ancients figured this out a long time ago. They saw the caravan disappearing over the horizon. Climbing the mountain, observers noticed that the horizon was expanding. From this followed the inevitable conclusion: the surface of the Earth is a hemisphere.
You will look into the sky and see the stars of the Zodiac in life, the cosmos will give us Like fate together in the space of the planet You will only receive answers on Earth After all, the Earth is the base for the worlds of the Universe light, without all the abstractions So that we love the blue planet And so that we give life, we are for the Earth - this Like a mother, loves and cherishes If the winter cold, she will warm everyone After all, she will not give offense, all children born In space She fell in love with all of us and warmed her soul Our mother planet, warmed her heart
FROM FLAT EARTH TO EARTH GLOBE
MULDAROVA SVETLANA GEORGIEVNA
THE FIRST TO REJECT THE IDEA OF A FLAT FORM OF THE EARTH IS THE INDIANS.
ANCIENT INDIA - THE COUNTRY OF WISE AND MATHEMATICS.
IN THEIR OPINION, THE EARTH IS NOT FLAT, BUT CONVEX (DUE TO THE MOUNTAIN.)
FIRST SCIENTISTS, THAT HAVE THOUGHT ABOUT EARTH SPHEROIDITY
ANCIENT GREEK SCIENTIST, MATHEMATIC.
HE BELIEVE THAT IN NATURE EVERYTHING IS CORRECT AND BEAUTIFUL.
AND THE MOST CORRECT AND BEAUTIFUL FIGURE, IN HIS OPINION, IS A BALL.
THE FIRST SCIENTISTS WHO PROVIDED THE IDEA OF THE BALL
ARISTOTLE
HE WAS A VERY OBSERVANT AND SMART PERSON.
COLLECTED EVIDENCE OF THE EARTH'S Sphericity.
ONE OF THE MOST STRONG PROOF OF THE EARTH'S Sphericity- MOON ECLIPSE
FIRST SCIENTISTS, THAT HAVE SPEAKED IDEA ABOUT THE BALL
ERATOSPHENES
REMEMBER WHAT IS HE FAMOUS FOR?
AND HE WAS THE FIRST TO CALCULATE THE SIZE OF THE EARTH!!!
THAT IS, ERATOSPHENES IN HIS CALCULATIONS IS ALMOST NOT WRONG!!!
DO YOU KNOW WHAT THE CIRCLE OF THE EARTH REALLY IS?
IT NEEDED ONLY THREE NUMBERS TO DO THIS!!!
THE LENGTH OF THE SHADOW THAT THE WAND DROPPED IN TWO DIFFERENT CITIES AND THE DISTANCE BETWEEN THESE CITIES.
THE CIRCULARITY OF THE EARTH MEASURED BY THEM IS 39,690 KM.
MAN FROM ANCIENT TIMES THINKING ABOUT THE FORM OF THE EARTH.
PYTHAGORAS SUGGESTED THAT THE EARTH IS SPHERIOUS, AND ARISTOTLE AND ERATOSPHENE SUGGESTED PROOF OF THIS PROPOSITION
