School skits about a chemistry lesson. Extracurricular event “Chemistry - the science of miracles”
In the land of inorganic substances
Extracurricular activity
as part of the subject week of natural sciences
Explanatory note
The 8th grade chemistry extracurricular activity described below is part of in-school science week. In organizational terms, it consists of two parts: part 1 - theatrical chemical miniatures prepared and performed by 9th grade students; part 2 – chemical competitions for two teams of 8th grade students.
Goals. Summarize and systematize students’ knowledge on the topic “Main classes of inorganic substances”; to develop schoolchildren’s interest in the subject “Chemistry”, erudition, the ability to reason logically and express their thoughts; to cultivate the need for knowledge about those substances with which a person comes into contact in everyday life; develop the ability to work in a team, develop feelings of camaraderie and mutual assistance.
PROGRESS OF THE EVENT
Chemical miniatures
Leading.In a certain kingdom, in the distant Chemical State, there lived a king, a great chemical sovereign. And he ruled the kingdom of inorganic substances. Let's get acquainted with the inhabitants of this amazing country. Over there, on the bench, two sisters met, and it seemed that something happened to them.
Acid class skit
(Two acid girls in caps with the acid formulas H 2 SO 4 and HNO 3 written on them.)
Acid H2SO4.Hello sister!
Acid HNO3.Hello, dear! You don't look well. Tell me what happened to you.
Acid H2SO4. You have no idea how tired I am, how exhausted I am. Haven't you heard anything? Good fellows came to our kingdom: such beautiful, such shiny metals.
Acid HNO3. Oh yes! I saw them out of the corner of my eye. Such a fidget Na, easy Al and such a cool guy Fe.
Acid H2SO4. Yes, but that's not what we're talking about. I have a good relationship with them, without any problems. I'm interested in others: they're so shiny, so expensive, there's no way to get close to them.
Acid HNO3. Oh yes! I remember. I saw two dandies here: Ag And Au, Seems. So what's the problem, dear sister?
Acid H2SO4.Yes, I just can’t come to an agreement with them. At least cry!
Acid HNO3. What are you, dear. We can’t cry, otherwise we’ll become weak. Although this does not apply to me. I am strong, I am beautiful, I am simply charming! I'll quickly put these guys into use. It’s not for nothing that I’m called Nitrogen.
Acid H2SO4. You think too highly of yourself. I'm no worse than you, all metals are crazy about me. But these two just don’t give in. Well, okay, I’ll find a way to deal with them!
Leading. Oh, that's what happened to them! Guys, can anyone explain what's the matter? Why does sulfuric acid have such problems with Ag And Au? (For the correct answer you will be given a ticket with a chemical sign.)
Grounds class scene
Leading.Meanwhile, two more residents of the Chemical Kingdom hid in the park. Let's hear what they whisper about.
Hydroxide NaOH.Oh, I didn't know these ladies were here. I would never go for a walk with you!
Fe(OH) hydroxide 3. Come on, don't be afraid! You're so caustic, brother, you can handle anyone!
NaOH hydroxide.What's true is true, but I can't stand acid! Especially these two, well at least the third one - Solyanka - is not with them. Otherwise something irreparable would definitely happen.
Fe(OH) hydroxide 3.Ha ha! I remember! Well, you got the ball rolling last year. Such neutralization was carried out.
NaOH hydroxide.Oh don't say anything, brother! We got so much salt - there was nowhere to put it.
Leading. Guys! What kind of neutralization were these two young people talking about? Who are these NaOH hydroxides? And Fe(OH) 3 ? How are they different? Which Solyanka were they talking about?
(For each correct answer - a coupon.)
Salt class skit
Leading. And here are the products of the neutralization reaction. Oh, how nice it is to look at these creatures! These are probably the most harmless substances. To what class of substances should they be classified? Who can name them?(For the correct answer - a coupon.)
Let's listen to what these salts have to say.
Salt CaCO 3 . I am the most important and important among you. Not a single student can do without me.
Salt KNO3.What a troublemaker you are, Chalky! Just think, you can write on the board. You can write in a notebook with a pen and pencil. But a person really needs me! Without me, not a single gardener will grow a large harvest. After all, I know how much the guys love carrots, tomatoes and cucumbers.
Salt NaHCO 3 .What a braggart you are, Selitrochka! After all, you can harm people.
Salt KNO3. Well, it’s not my fault, but the person himself, if he thoughtlessly uses mineral fertilizers. And you, soda, why are you keeping silent?
Salt NaHCO 3 .Why brag? People don't use me in large quantities. But even without a small amount of soda, mom won’t bake fluffy pancakes. Yes, and cookies will not be cookies, and a cake will not be a cake without soda. I can also help clean the dishes, and then the cups and plates will simply shine. So any housewife needs baking soda.
Oxide class scene
Leading. Look, guys, what important conversations salts have. Indeed, they find various uses in human life. Well, we have met all the inhabitants of the Land of Inorganic Substances. And now…
(Oxides Na 2 O and SO 3 run out.)
Oxides (together).Hey Hey! They forgot about us! We are also residents of the Chemical State.
We are a friendly family
Oxides are our name.
Our dad Oxygenium,
In Russian - Oxygen.
SO3 oxide.Guys, do you know why our dad O 2?
Na2O oxide.Well, the braggarts spoke to us here. Ha ha!
SO3 oxide. Oh don't tell me. They showed off a lot of salt: both Chalk and Soda. What are you, what are you, you can’t live without them...
Na2O oxide. And bases with acids are simply embarrassing to listen to. Well, what are they without us? Nothing!
SO3 oxide. Without me, no sulfuric acid will be produced.
Na2O oxide. And without me, alkali will not form.
Oxides SO 3 and Na 2 O (together). If we unite together, we can form salt.
Leading.Guys, have you guessed which one? Come on, who's smart?(For the correct answer - a coupon.) Now we have met all the inhabitants of the Chemical State. Let's summarize: who did a better job with the questions that were asked during the presentation. Count your tickets, whoever has the most wins a prize.
Chemical competitions
Team competition "Chemical Train"
Four cars are drawn on the board for two teams: “Oxides”, “Acids”, “Salts”, “Bases”. There are cards with formulas of substances for two teams on the table. Whichever team fills the carriages with passengers faster will win.
Competition "Magic Elements"
The elements are given: Ba, S, P, O, H, Ag, N, Al. Whichever team creates the most chemical formulas in 2 minutes and gives names to the resulting substances wins.
Competition "Vertical racing"
To win the competition, you must answer all questions without prompts or with a minimum number of them.
Questions for the 1st team
1. A substance that consists of oxygen and some other element.
(Oxide.)
2. It is a complex substance. If it dissolves in water, it is called an alkali. Name the class of such substances.
(Grounds.)
3. In it, litmus turns red.
(Acid.)
4. Another name for hydrochloric acid.
(Salt.)
(Nitrogen.)
6. The formula Fe(OH) 3 belongs to the substance...
(Iron(III) hydroxide.)
Questions for the 2nd team
1. In its solution, litmus turns blue.
(Alkali.)
2. This substance has a hydroxyl group.
(Base.)
3. A substance with the formula MgCO 3 is….
(Magnesium carbonate.)
4. These substances are obtained by the oxidation reaction of simple substances.
(Oxides.)
5. This gas is part of the air, it supports combustion and respiration.
(Oxygen.)
6. In the reaction of this acid with metals that are in the series of metal voltages up to hydrogen, hydrogen is not released, but other gases are released.
(Nitric acid.)
Summing up the results of the competitions and the lesson as a whole.
The purpose of the lesson:
Check your understanding of basic chemical concepts.
Identify knowledge gaps and outline ways to overcome them.
Consolidate and generalize students’ knowledge on the topics studied,
Consolidate and generalize the ability to apply knowledge acquired in class in practice.
Continue to develop teamwork skills.
Foster the need for mutual assistance.
Development of persistent positive interest in the subject.
Group work:
Mutual assistance from the elders in the group.
Monologue speech.
Self-esteem is mutual control.
Written work – assessment in a notebook and on a mark sheet.
Representative – replies from the group (clarification, addition, correction).
The role of the teacher:
help;
encouragement
creating a creative atmosphere.
During the classes
I. Teacher's opening speech.
II. KVN - team work.
(But each student has a piece of paper and a pen on their desk. They participate by evaluating themselves.)
III. Summing up, final word from the teacher, grading. Volcano in honor of the winner.
The lesson begins with music: the 1st part of the “Bogatyr Symphony” sounds Borodin.
Hello, dear guests! Hello guys!
I see everyone is smiling, and this is the main thing now. Our lesson began with A. Borodin's Bogatyr Symphony. You may ask, what does Borodin have to do with our lesson? The most direct. This is a Russian chemist, an outstanding Russian composer. “Mr. Borodin,” Professor Zinin often told the student, “do less work on romances, I have high hopes for you.”
“Make music,” the composer Rimsky-Korsakov urged the already famous chemistry professor.
But Borodin could not live without music or without chemistry. Let me give you an example. 1872 Borodin discovers a new type of chemical reactions: aldol condensation. In the same year, 1872, he wrote individual scenes from the opera “Prince Igor” and the first part of the “Heroic Symphony”. This is how a person can work. Let him be a good example for you.
Today in the KVN lesson we will test your knowledge of basic chemical concepts, and even if you do not become great chemists in life, but this knowledge will help you sail the sea of chemical science. And those who have forgotten signs, valency, solve problems poorly... you won’t swim far with such a load. But they will learn about their problems, and we will help eliminate these problems.
Jury (parents, teachers, high school students are invited to the jury; they receive pre-prepared instructions, correct answers and solutions).
Each competition is scored as follows: for the correct answer 10 points, auctions - according to a 5-point system; the entire winning class receives 5 points; The defeated class, depending on participation and activity, receives 4 or 5 points.
We have 2 lessons of KVN (lesson + circle or class hour, but it’s ideal to do it all and finish it in 60 minutes), so one column will be filled in, and the other will be for individual assessment, everyone’s work will be taken into account.
Your activity when working, solving a problem, calculating equations. And the first mark is given by the jury, and the second by the jury + teacher. But if you received the first grade right away, then you can get the second one in lesson 2 because I need to check your notes.
KVN “What we know, what we can do”
TEACHER: We are opening our club of cheerful and resourceful chemists. Teams take their seats! Meet our jury! Now, teams, introduce yourself to each other.
8 A class
We came here to fight to achieve well-deserved victories!
We remind you out of respect that he will not be defeated
In a big chemical battle, who is strong in chemistry.
We wish you to be as active as cesium in this meeting!
With your jokes and speech, conquer the jury and us all.
Grade 8 B Everything is based on chemistry.
Where are you going? To the dry cleaner! Well, what about you? - to a chemical plant.
There's a bustle at the chemical plant!
We will get silk from oil. This is how beauty will be.
Gas water came in for a drink, chemical. the reaction is underway.
Everything depends on chemistry.
The one who knows her better will win today!
Teacher-leader: Let's start warming up. Teams are given 5 questions (homework).
Class 8A team asks
What simple substances are in a liquid state under normal conditions? (Bromine; mercury)
Who confirmed Lomonosov's law and in what year? (What was the fate of this person?)
What is the coefficient? Why is it needed?
What do the entries mean: -5C; 5H; ABOUT; 2Hg; 5O 2; H 2 O; N?
Write the formula correctly - VO; ZnO; SO(VI); ClO(VII)PO
Asks the 8B class team
What 2 chemicals do we encounter at home every day (H 2 O; NaCl)
Who coined the word “thermometer”?
What is a molecule?
What does the notation 4H mean? 3O 2 ; CuO; 8S; R; H 2 O; 3Mg?
Write the correct formula - KS (S – II), FeO (Fe – III), CuO (Cu – I), NaO, AlO.
FOR EACH CORRECT ANSWER 20 POINTS - max 30 sec.
EXPERIMENTAL PAUSE (high school students show trick experiments: a fireproof scarf, a snake made from a norsulfazole tablet, etc.)
Captains competition
8 A class
Where did the word “atom” come from, what does it mean?
Who is R. Boyle, what was he wrong about?
What methods of separating mixtures do you know?
8 B class
1) What is valency?
2) What theoretical and practical significance did the law of conservation of mass of matter have?
3) Name the most important physical properties of substances.
For each answer 20 points, max 30 seconds.
The captains are given the same task: who can solve it faster and more correctly.
(Write the reaction equation and calculate the amount of substance and the mass of the resulting magnesium oxide if 6 g of magnesium is burned. (If desired, you can replace it with a more relevant one.)
Auction at the board
1 person from the fans team
Who is faster?
5 bodies - 5 substances
According to the 5-point system (chalk at the board)
Competition 1–2 people
On the board there is a table with sentences and columns for recording.
Red - elements
Blue - substances
Pure water contains oxygen
fish breathe oxygen dissolved in water
gas meter filled with oxygen
When mercury oxide decomposes, oxygen is released
Mercury oxide contains oxygen
dry ice is made up of carbon and oxygen
oxygen is part of air
Participants start at the same time.
For each correct answer 10 points.
Auction No. 2. Who is faster.
Who can write the most names of chemical elements ending in -iii-?
According to a 5-point system (chalk at the blackboard).
Competition No. 2
2 people from each team.
Describe what happens when a spirit lamp is handled incorrectly; 10 minutes while they cook.
Auction No. 3
One person from each team. Arrange cards with symbols of chemical elements in alphabetical order in accordance with the Russian name.
N Al H Fe Ca O Mg Cu Na Hg S C P Cl Zn
According to a 5-point system.
Competition No. 3
Distinguish between a pure substance and a mixture.
Task 1 person per team, time 1 minute
Blue is pure.
Reds are a mixture.
Sugar
Sea water
The soil
oxygen
Air
Milk
Granite
For each correct answer - 10 points.
Competition No. 2
Demonstration of safety violations when working with an alcohol lamp.
According to the 10-point system
Auction No. 4
Who will write the reaction equation faster (write on the board 2 times).
Fe + HCl = FeCl 2 + ?
Al + O 2 = ?
CaCO 3 = C aO + ?
Al + HCl = AlCl 3 + ?
Fe(III) + O 2 = ?
For fans, determine the type of chemical reaction. The jury determines fan activity using a 5-point system.
Experimental pause.
Turning water into milk
Solutions of BaCl 2 and Na 2 SO 4
“Water into blood"
2 cups H2O
1 + FeCl 3 (Cl 2) + 1 ammonium rhodanite
Competition No. 4
Sugar C 12 H 12 O 11
NaCl salts
Soda Na 2 CO 3
Water H 2 O
Oxygen O 2
The whole class counts, the first and last participant are evaluated. Each correct answer is worth 10 points, time limit is 5 minutes.
Auction No. 5 Name the chemical glassware and accessories.
5 items each.
According to a 5-point system
Competition No. 5 QUIZ.
Which element is named after the island? Why? (Cu)
What element was discovered in the basin with laundry? (Na)
Liquid silver – what are we talking about? (Mercury)
Find the moon and the earth in the Periodic Table? (Selenium and tellurium)
Which elements are named after which countries?
What is the name of the purple element? (Iodine)
What chemical element is known as a cosmetic product? (Antimony)
What liquid chemical elements do you know? (Bromine and mercury)
Who introduced common chemical designations? (Berzelius)
What are the basic rules of behavior in the chemistry classroom?
Each correct answer is worth 10 points
The floor is given to the jury (the jury sums up the results, counts the number of points scored, and expresses its impartial opinion).
Presentation of certificates, congratulations and Vulcan in honor of the winner.
The remaining time is spent solving cognitive problems.
Summing up, grading.
If you have time, you can listen to the reports: “The Plasticine Crow”, “The Mystery of Berthold Schwartz” and any others
Jokes, music.
Goals:
- Popularization of the subject of chemistry.
- Instilling interest in the subject, broadening the horizons of students.
- Career guidance work among younger schoolchildren with the aim of attracting them to specialized chemical and biological classes.
A 10th grade student comes on stage and reads the poem “Chemistry”
It seems like just recently
There lived a man and did not know
What is made of gray stone
You can smelt metal
Like ordinary sand underfoot
Fire turns into glass.
It's hard to imagine now
How long ago was it
Years after years are running away,
Century after century passes.
And how much practical knowledge
Man managed to save up
The energy of the atom has submitted to us
What has been hidden for centuries.
We have learned to change the composition of the cores
Chemistry is in our hands.
Is it really a fairy tale?
Nylon is obtained from resin.
Beautiful doodle made of spruce,
From gas - smart nylon
And thinner than a thread of a spider's web.
We have learned to receive now
Made from spruce wood
A beautiful strand of silk
Will you look ahead?
Will you look back?
It's been so long
A guiding star for Russian science
I wish I was ahead.
The presenter comes on stage and sprays a sheet of paper with iron (III) chloride. The message appears "A wizard can't do it"(On the sheet this inscription was written in advance with yellow blood salt and was practically invisible)
Presenter 1. Dear guys, the evening is not quite usually called “What a wizard can’t do.”
Presenter 2. Today we will talk about one of the most ancient sciences - the science of substances and their transformations - chemistry.
Presenter 1. The first practical information on chemistry appears, it is believed, in Ancient Egypt. Based on the color, the soils in the Nile Valley in Egypt were called “hel,” which means “dark” or “black.” This is where the name “chemistry” came from.
Presenter 2. Other researchers associate the word chemistry with the ancient Greek “Hemeia” - the art of smelting metals. After all, metallurgy for centuries has been and remains to this day a vast area of practical applications of chemistry.
Presenter 1. So, what a wizard cannot do, he can do...
The lights go out. Hottabych enters holding a lit sparkler in his hand.
Hottabych.(interrupting) Stop your highly learned speeches for a moment, O most venerable one.
Presenter 2. What's happened?
Presenter 1. Why are you disrupting the flow of our evening? Who are you?
Hottabych. I am the mighty genie Hasan Abdurakhman ibn Hottabych.
Presenter 2. What do you want, dear Hottabych?
Hottabych. My ears, oh most worthy one, are missing one impudent phrase.
Presenter 1. What phrase?
Hottabych.“What a wizard can’t do.”
Presenter 2. This is the name of this evening and it is dedicated...
Hottabych. Oh, wise presenter, before you pronounce the name of the person to whom the evening is dedicated, answer a few questions.
Presenter 1. Please.
Hottabych. Did you know that Hasan Abdurahman can build a palace out of thin air?
Presenter 2. Certainly.
Hottabych. And what about the fact that in the summer he will be able to make snow on which you, most worthy ones, will ride on wonderful boards called skis?
Presenter 1. And we know this. And much more.
Hottabych. Then answer, O arrogant youths, what is it that a wizard cannot do?
Leading 2. Before answering the question, I also want to ask you something.
Hottabych. Ask, O leader. Hasan Abdurakhman ibn Hottabych will answer any question, for in his corner is collected the wisdom of centuries and millennia.
Presenter 1. Tell me, could you give your magical power to everyone sitting in this room.
Hottabych. This is one of the most ridiculous questions I have ever heard. Of course not. If I give everyone magical powers, then everyone will become wizards, and wizards will be ordinary people. No no. I can't do this.
Presenter 2. So you answered yourself. Yes, that means. which is beyond the power of a wizard. And the one to whom our evening is dedicated will be able to endow anyone with miraculous power.
Presenter 1. Sit down, dear Hottabych, and be a guest at our evening.
Presenter 2. Friends, P Let's continue our evening. Guys, we have new guests, they’re just arguing about something. Let's hear what they argue about.
1st student. There's nothing better than lemonade. I love it so much that one bottle is not enough for me and I drink from two at once.
He takes a glass from the table and simultaneously pours a yellowish liquid into it from two bottles - solutions of ferric chloride and potassium thiocyanate. A red-brown solution is formed:
FeCl 3 + 4KCNS = K +
First student. Great! I got Pepsi-Cola. I love her very much too.
Shows the audience a glass of Pepsi-Cola.
Second student. And I love Fanta. What could be tastier than raspberry forfeit?! By the way, I can get it from water. Here.
Add a little “water” from the flask – sodium hydroxide solution – to the glass with “water” - a phenolphthalein solution. Shows everyone a raspberry-colored “fanta.”
Magician. Still, I believe that the healthiest drink is milk.
Add calcium chloride solution to sodium carbonate solution:
Na 2 CO 3 + CaCI 2 = CaCO 3 + 2HCI
Third student. And I tell you that there is no better water! Let's get your glasses here.
Pours a little “water” from one flask (sodium fluoride solution) into “Pepsi-Cola”, adds “water” from another flask (hydrochloric acid solution) into “milk” and “Fanta”. “Water” is formed in all glasses:
NaOH + HCI = NaCl + H 2 0;
CaC0 3 + 2HC1 = CaC1 2 + H 2 0 + C0 2
Third student. Mineral water is both tasty and not harmful!
The first student leaves offended. The magician defiantly steps aside.
Second student (mischievous). But I still prefer Fanta.
He adds sodium hydroxide solution to his glass and gets Fanta again.
Third student. No, water is better!
He pours hydrochloric acid into the Fanta again, and the crimson color disappears. The argument can continue until the glass is filled to the brim.
Presenter 2. Let's not argue, guys. All drinks are good, and advertising time is over. It's better magician will light fireworks for us in honor of chemistry week.
Volcano eruption experience
Pour ammonium dichromate onto a ceramic tile in a heap, make a depression, place a little magnesium powder in this depression, then potassium permanganate. Drop concentrated sulfuric acid from a pipette. A few seconds later the “volcanic eruption” begins.
Queen CHEMISTRY rises onto the stage, she is decorated with a crown on which is an image of the symbols of chemical elements.
The Queen about chemistry:“She came up to us and extended her hand in a friendly manner. Hello, she said, I am chemistry. Follow me and I will lead you to my kingdom. I will reveal hundreds of secrets to you. I will tell you hundreds of riddles and help you solve them. “Sorry, dear sorceress,” we wondered why your face was so familiar. Chemistry smiled and straightened her hair. Why, we meet with you every day. I am everywhere. It’s true, you people are used to me serving you and don’t notice me. But I don’t pay attention to such trifles and I’m not angry with you. The main thing is that you respect me and trust me. You let me out into the fields - and the harvest quickly grew, you looked into the plant and saw many machines and other mechanisms. My wonderful fibers are used to make wonderful wool suits and light waterproof raincoats. I help treat the sick and grow bread. I feed and clothe people. And it’s not for nothing that they love me so much and call me a sorceress.”
A magician is on stage performing an experiment "Burning Snow"
We pour snow into a glass, compact it, and quietly place calcium carbide in it. Set it on fire with a torch. The released acetylene burns.
Scene: “Terrible Dream”
The table is covered with a tablecloth, the student sits and monotonously memorizes the pronunciation of the signs, and gradually falls asleep. The lights are dim. Waltz music. Figures in costumes enter the stage. Metals stand out clearly. Then gases appear in suits made of gauze, iron in the armor of a medieval knight. With spears and swords in a helmet. It has a symbol of iron on it. Aluminum in the helmet, collar, cuffs. Symbol on the chest. Gold is dressed in a red robe, edged with cotton wool, a crown on his head, and a staff topped with a symbol in his hands. Copper in a long green sundress, trimmed with yellow sequins, on the head is a kokoshnik with the symbol of copper. Elements move slowly across the stage. Gases are especially mobile. The bright light turns on.
Copper: Do you know who I am? That's right, I'm copper. I have been serving people faithfully and faithfully for many centuries. Stone tools were replaced by tools made of bronze, which included me and my old friend tin.
Sulfur: What are they making of you now?
Copper: Like what? They pull wire out of me, make electric wires that bring light to people, they also make machine parts, kerosene stoves, and samovars.
Iron: (shrugs shoulders) Brrrr, I wouldn’t agree to become a samovar for anything. How unpleasant it is when water is poured into you. I am terribly afraid of dampness; I quickly become sick and become covered with rust.
Copper: I’m not so capricious and I’m not afraid of dampness; it’s not for nothing that water taps and other objects that have to deal with water are made from me. It’s really worth visiting the ship to see how I sparkle in the brightly polished instrument handles and door handles.
Iron: Just think, the importance: copper handles, some kind of machine parts. But they make entire machines and machines out of me, and even then I don’t put on airs. What is a worker’s tool, a soldier’s weapon, made of? Whatever you say, I am the most needed metal right now. I am always with people both in struggle and in peaceful work.
Gold: What's true is true. Iron with people. They are already so tired of it that no one wants to watch it. Not like me! How they were chasing me! Because of me, wars have always broken out and people have died. And how they value and care for me now. Still would. After all, I'm not lying under your feet. I am a rare metal!
Iron: Just think it's rare! Yes, in ancient times I was also a rare metal. Only small decorations were made from me, and iron utensils could only be found in royal kitchens (Proudly raises his head and steps aside)
Oxygen : And what are they arguing about, these metals! Who is more important: copper, gold or iron? Every child knows that I am the most important! After all, all living beings on earth breathe from me. And if it weren't for me, there would be no one to chase this grumpy gold (points contemptuously towards gold)
Gold: (indignantly) How! How dare you, you insignificant little gas, who doesn’t even have color, let alone shine, talk about me so disrespectfully! Do you know who I am! I am the king of metals! People have long understood this and reward their heroes with a gold star. Isn’t it a gold medal that is awarded to excellent students who graduate from school!? Have you ever heard a parent praise their children? (he is my golden child) Pay attention, he is golden, and not some kind of copper or iron. I'm not even afraid of this (shows) toothy oxygen, from which other metals lose their shine, and iron (shows) becomes covered with an ugly rusty crust... Oh! I'm worth a lot (straightening his chest, leaning on his staff, moves to the side)
Aluminum: (goes to the middle) What arrogance! (points to Ai) For example, just a hundred years ago I was very expensive. It was even hard to believe that people paid 1200 rubles in gold for 1 kg. Of course, back then they only made small things out of me. Imagine a small ring (points to finger) made of aluminum was considered a very valuable gift. But I wasn’t so arrogant. On the contrary, I became cheaper and cheaper. And now I am very pleased that I live in every house, that pots, spoons and barrels are there and serve people well.
Copper:(mockingly) Yes. This is true. No wonder this cheap upstart is replacing copper everywhere.
Iron: Oh, let me, let me! We seem to have gone astray. Dear gold, I put it as if I was no longer worth anything, I don’t matter to everyone, I’m tired of everyone and, moreover, I’m lying under their feet. You heard? (pause) This is very disappointing! Do you know what would happen if I completely disappeared! Just imagine, a giant magnet flashed over the earth. Instantly all iron objects are torn from all places and carried away behind him: cars, planes, trains and ships disappear. Notebooks and books are scattered on pieces of paper. Roofs of houses rise into the air, walls break, because... they would lose nails, hooks, bolts.
Hydrogen: I wonder what would happen to people then?
Iron: People? They would have died instantly, because... would be deprived of the iron that is part of the blood. Now judge for yourself how important I am.
Sulfur: Dear metals! Shame on you to argue. All I hear is, I’m more important, I’m more gentle... I don’t like braggarts. I am a modest element, I don’t have a metallic sheen, but I can tell you something about myself. Please tell me what needs to be done to get fire?
Hydrogen: Fire? Well, of course, strike a match and that’s it.
Sulfur: No, not all! If I don't sit in my place in the head of this match, it won't light. (to iron) Can you tell me what needs to be done to make the gun fire?
Iron: Well, of course, as far as I understand, you need gunpowder.
Sulfur: Absolutely right. I am also part of the gunpowder, though not alone, but in honorable company with carbon and bertholite salt. I would also like to remind you that paints and medicines are made from me. I also drive you in cars, because without me there would be no tires and not a single car would drive.
Gold:(points to gases that are slowly swirling) Pay attention to these frivolous elements. They spin and spin, but there is no solidity.
Hydrogen and oxygen: (in unison) And people need us too.
Iron: I don’t understand, is it possible to make a plane or a car out of you? You cannot even be used as a shoe nail.
Copper: You won't even make a small water tap.
Hydrogen: It's a shame to hear how others measure everything by their own yardstick. Of course, you can’t make a machine out of me, but I can fly into a ball and carry it above the clouds. No wonder I am the lightest on earth. Tell me, can anyone live without water? Of course not. What does water consist of? Of me and my old friend. So we are the most necessary gases for people. And to call us frivolous is simply not in your Majesty’s mind!
Gold: (goes to the middle) Enough controversy! Without a doubt, all the elements are needed. And people found a useful use for everyone. (Leave)
Presenter 1.
Here's some more fun for you:
Who will give his hand to be cut off?
It's a pity for the hand to be cut off,
Then the patient needs to be cured!
(Calls someone who wants it)
Presenter 2.
We operate without pain.
There will really be a lot of blood.
Presenter 1.
For every operation
Need sterilization
Help, assistant
Give me alcohol
Presenter 2. One moment.
Presenter 1.
We will lubricate it generously with alcohol,
So that everything is sterile.
Don't turn around, patient.
Give me the scalpel, assistant!
Presenter 2.
Look, just a trickle
Blood flows, not water.
But now I'll wipe my hand -
There are no traces of cuts.
Conduct the experiment “Blood from a wound and healing.” A solution of iron (III) chloride is applied to the hand with a cotton swab, a scalpel is moistened in a solution of potassium thiocyanate and an incision is made with the scalpel. "Blood" appears. “Treated” with sodium fluoride.”
A student reads a poem Stepan Shchipachev “Reading Mendeleev”
There is nothing else in nature
Neither here nor there in the depths of space
Everything from small grains of sand to planets
The elements consist of a single
Like a formula, like a work schedule
The structure of the Mendeleev system is strict
The living world is happening around you
Enter it, inhale it, touch it with your hands.
There is simply gas - the lightest hydrogen.
There is oxygen, but together it is air
June rain from all its bounties
September fog at dawn.
Iron, silver, antimony are boiling,
And black-brown solutions of bromine.
And it seems the universe itself
One huge laboratory.
Here optics will hardly help the eye,
Here an inquisitive thought is always truer
You won’t see a speck of dust right away,
To discover the depths of the universe in her.
Chemists appear on stage. They demonstrate experiments:
"Chameleon"
We place a yellow solution of potassium chromate into the cylinder, add a few drops of sulfuric acid, the solution changes color to orange. Add sodium sulfide to the resulting solution, the solution turns green.
"Fire from the Sky"
Pour potassium permanganate onto the ceramic tile and add a few drops of concentrated sulfuric acid. We put wood shavings in a heap. Moisten a cotton swab with alcohol and hold the swab in your hand. We keep our hand on the slide and quietly drip alcohol.
Leading: Guys, today you got acquainted with some miracles that can be accomplished with certain knowledge and skills in chemistry. We hope that our evening lifted the curtain on such an amazing science as chemistry. And we expect that from next year you will all study it with pleasure, perseverance and patience and come to the chemical and biological class.
Literature:
1. Aleksinsky V.N. Entertaining experiments in chemistry. M. Enlightenment. 1996.
2. Internet resources.
Teacher! To live without nerves,
Looking at children's pranks,
You may not be sad,
But you have to be humorous.
(E. Zapyatkin)
Every teacher biology your skeleton in the closet.
A biology teacher's dream came true: he grew a forest of hands in his garden.
A biology teacher was detained for distributing a herbarium.
A notebook is a complex multicellular organism...
For their favorite biology teacher, the children prepared a large butterfly in their own net.
At the school named after Pavlova, after the bell rings, children salivate.
In disputes, not only truth is born, but also mushrooms.
Tsetse flies have twice as much vitamin C as regular flies.
A biology teacher was strangled by a toad.
A biology teacher keeps a tight rein on his students.
Take care of the trees: our ancestors lived on them!
A pet store urgently needs a female seller.
Biology teacher in class:
Petrov! You have only one positive quality - the Rh factor.
In biology class:
Ivanov! You got your cerebral cortex from an oak tree!
The smaller a person's brain, the more stupid thoughts it can accommodate.
In biology class:
The rhinoceros sees very poorly.
Well, with his weight, this is no longer his problem.
Answer in biology class.
- To find out whether a mushroom is edible or not, forest You need to go together!
Biology lesson is over. The student shouts after the leaving teacher:
Ivan Ivanovich! You forgot your skeleton!
Entry in Daria Dontsova’s school diary: “I prepared a report on biology. I’ve been reading for the third week now. I hope the killer is not a zebra.”
Vegetarians don't eat animals, they overeat them.
Sign. If swallows fly very low, they are mice.
According to the rat, man is a cruel, stupid and stubborn creature.
Know that every time you poke a key on your mobile phone, you are crushing at least 1000 microbes to death. Be merciful - take your fingers off the buttons!
COSINE - harvesting season.
TO FREEZE THE WORM - spray the garden with insecticides.
A flexible animal is a donkey (camel) with luggage.
The fishing teacher caught a small catfish, admired it, and, throwing it back into the river, said:
- Go home and come back with your parents tomorrow!
Mary Ivanna! This is the armpit. Where's the undercut?
Two schoolchildren are talking:
- We just wrote a test on anatomy. Sanka got a bad mark.
- For what?
- For the cheat sheet. The teacher caught him while he was counting his ribs.
If there are nails on the feet, then there should be hands on the hands, and animals generally have bast shoes.
Biologists Our school advises students to fight only in plantain thickets.
In zoo:
- On the right you see a male gorilla, on the left above – a female gorilla.
- It's clear. Where is the gorilla himself?
At the zoo, a biology teacher for children:
Guys! Don't touch the lion! He may have fleas.
An advanced chameleon was discovered in the jungle - 40 thousand colors and polyphony.
A penguin is just an overfed swallow.
The mouse is an animal whose path is littered with fainting women.
Labor made a man out of a monkey, and a vehicle out of a horse. It depends on your luck.
If you watch a monkey, there is a suspicion that it knows how to become a human, but does not want to do it...
The tiger is actually a hatchet!
Microbes slowly crawled over Lefty's body, dragging the horseshoes with difficulty.
The Red Book is a list of scarce animals.
IN Moscow At the zoo, the leopard Senya went crazy trying to eat a gazelle. The driver managed to jump out.
Announcement.
Come to us for the most extreme show in the world - “Open Day”. City Zoo.
A duck is a bird that walks as if it had been riding a horse all day.
Kangaroo dad:
Darling, shouldn't we have another child?
Kangaroo mother:
You forget that we simply cannot afford to have more than two children!
Papa beaver went hunting and caught a stool in the river. All family gathered for a gala dinner in the evening. They are sitting at the table, napkins tied, a stool on the table. And the smallest beaver says: “Dad! Can I have a leg?”
Have you heard the blackbirds sing? How do dogs bark? Are cats screaming? A wonderful apartment on the ground floor near the bird market especially for you!
Do you know why small dogs are so angry? Because they are concentrated.
Geneticists came to the conclusion that a person’s conscience was in the tail.
I am allergic to biology. I got two grades from her all over my diary.
Zoology lesson.
Vovochka, what are the names of creatures that can live both in water and on land?
Sailors!
Ecology news. Green party activists took the director of a chemical plant by the gills.
School news. When in a biology lesson the teacher talked about pistils and stamens, everyone listened with interest, and only Lena, a poor student, was bored.
As a child, Dima really didn’t like birds, so he painted holes on the birdhouse with black paint.
Volodya the hamster was born, lived his whole life and died in the biology classroom! This is a lesson for life.
Why, even if you don’t understand plants at all, but you chop mathematician e, physics, computer science, then are you a nerd anyway?
A person is 70% water, and a cucumber is 90%. Using simple mathematical calculations, you can calculate that a person is 50% a cucumber.
I'm changing my lap dog to a two-room dog.
I'll give the cactus into good hands, potty trained.
An elephant consists of a trunk, tusks, ears and a hippopotamus.
Children are the flowers of life, so they need soil and dirt to grow properly.
Clean children are good, but healthy ones are better!
Why do hippopotamuses have round feet?
- This is so that the poacher cannot determine in which direction they jumped.
Scientists have discovered a new species of fish - the bastard fish. It doesn’t get caught, and that’s all...
Discovery at the laboratory biology.
Meat was found inside the whitefish. Hence the conclusion: the whiting is a predator.
And I birch tree recently planted. Now I fatten her up for firewood.
Scenario for an entertaining evening in chemistry “Chemical Fireworks”.
Nowadays, when each student’s choice of an academic subject for in-depth study, based on his capabilities and interests, is of particular importance, classes outside of class hours become especially significant. Among this type of activity, chemistry evenings occupy a large place.
Goals:
Educational:
In a playful way, develop students’ knowledge about chemicals, reagents and their transformations.
Continue to develop students’ ability to use chemical utensils and chemicals.
Educational:
Develop observation skills and memory (when showing entertaining experiments)
Develop the ability to compare (using the example of comparison and analysis of various experiences)
To develop students' interest in chemical science (through the demonstration of entertaining and interesting experiments)
Educational:
Continue the formation of a dialectical-materialistic worldview based on ideas about the importance of chemical science for human life.
Time: 40 min – 60 min.
Chemists: Hello!
1-chemist: We are chemists! And chemistry means sleepless nights
2-chemist: These are constant conversations about chemistry.
3-chemist: These are chemical laboratories.
4-chemist: These are the parents who say: “And our child is a chemist.”
All: And this is life!
1-chemist: But you may ask: why doesn’t everyone become a chemist? Yes, because chemistry means sleepless nights.
2-chemist: This is a lot of talk about chemistry.
3-chemist: These are chemical laboratories (he says, pinching his nose).
4-chemist: These are the parents who say: “And our child (ugh!) is a chemist.”
All: And this is life!
1-chemist:(proudly) But still, we are chemists because chemistry means sleepless nights!
2-chemist: This is constant talk about chemistry!
3-chemist: These are chemical laboratories!
4-chemist: These are the parents who say, “And our child (beats himself on the chest and says proudly) is a chemist!
All: And this is life!
1-chemist: Well of course, without a doubt
We need to study chemistry
Without knowledge of all phenomena
It's impossible to live today.
2-chemist: We need to do better
To us, friends, in teaching
And you shouldn't sigh
That chemistry is torture!
3-chemist: If we didn't know chemistry,
We would always stomp on foot:
Bus without fuel
Will never go!
4-chemist: So that we grow normally
Strong and strong
Vitamins produces
Our chemistry too!
1-chemist: So that the plants grow,
Substances were invented.
It would be nice for us to have such -
They would grow big quickly.
2-chemist: Rubber is rare in nature,
You can't live without it.
We would walk through puddles
In felt boots and without galoshes!
3-chemist: Widely entered into our everyday life
Various plastics
In a very short time
They were recognized by the masses!
4-chemist: Let the polymer be for hair,
Stimulating growth
They'll invent it as soon as possible
Then the braids will grow.
Demonstration experience: "Martian Landscape". (On the poster, write “chemistry is a magical land” in advance with phenolphthalein, and then, when showing the experiment, wipe the colorless inscription with a swab soaked in alkali. The inscription will turn crimson.)
1-chemist: Why is chemistry a magical land? Yes, because chemistry, like no other science, is capable of working miracles.
2-chemist: Chemistry - allows a person to extract metals from ores and minerals, extract from natural raw materials - substances one more wonderful and amazing than another, it gives birth to hundreds of thousands of substances, even not found in nature, with useful and important properties.
3-chemist: It turns oil into rubber, gasoline; gas - into the fabric; coal - in perfumes, dyes and medicinal substances.
4-chemist: The list of good deeds that chemistry does is truly inexhaustible. Chemistry feeds us, clothes us, puts on shoes. Every person (without knowing it, carries out chemical reactions every day, without even leaving home: washing his hands, lighting matches and gas, preparing food).
1-chemist: Today we want to invite you to chemical fireworks and show only a small part of chemical experiments that may seem wonderful to you. But we are people - and we ourselves create these miracles.
Demonstration experience: "Lighting a fire without matches." (For the experiment, prepare a slurry of KMnO 4 and H 2 SO 4 (conc.). Place this slurry on a tile and quietly add alcohol to it. A reaction occurs with the release of a large amount of heat and the excess alcohol ignites.)
2-chemist: I recently read a book about how there used to be people who tried to turn all metals into gold, and they also tried to get the “elixir of life.”
3-chemist: Yes, they were called alchemists, they tried to get the “philosopher’s stone”.
4-chemist: And I recently found a recipe for obtaining the “philosopher’s stone”, if you want, I’ll read it (unfolds the manuscript and reads):
To make the elixir of the sages called the “philosopher’s stone,” take lead, my son, and heat it until it turns into a “green lion.” After that, heat it up more, and it will turn into a “red lion”. Boil it in a sand bath in sour grape alcohol, evaporate the product and you will get a gumy substance that can be cut with a knife. Place it in a clay-lined retort and distill slowly. The "Cimvarian shadows" will cover the retort with their "veil", and you will find inside it the "true dragon", because it devours its tail, and distill the product again. Finally, my son, cleanse carefully and you will see the appearance of a burning liquid and human blood.”
1st chemist: A you know, I can get this amazing elixir myself.
Demonstration experience: "Chameleon". (Pour a solution of potassium chromate into a glass, acidifying it with a few drops of sulfuric acid. While stirring the solution with a glass rod, add a solution of hydrogen peroxide: a blue color appears, which soon turns green.)
2-chemist: The elixir is also a miracle for me, look, I can instantly get wine or milk from water.
Demonstration experience: "Getting wine and milk." (The production of wine is the interaction of phenolphthalein and alkali; the production of milk is the interaction of sulfuric acid and barium chloride.
3-chemist: Yes, water can really perform various miracles, but have you heard that water can be an arsonist?
Demonstration experience: "Interaction of potassium with water."
Demonstration experience: "Highly flammable liquid." (Place crushed KMnO 4 crystals into a porcelain cup, and then drop 3–4 drops of glycerin onto them from a pipette. After some time, the glycerin ignites.)
Demonstration experience: "Lighting a fire with water." (Grind iodine in a mortar, mix 4 parts of iodine with 1 part of zinc powder. Mix well, make a slide and drop a few drops of water on this slide.)
Demonstration experience: “Fire Cloud” (Ignition of paraffin in water)
4-chemist: Have you ever seen burning snow? Look here:
Demonstration experience: "Burning Snow" (Pour snow into a jar and compact it. Then make a depression in it, into which place a piece of calcium carbide. Bring a lit match to the snow - the snow begins to burn.)
1-chemist: Yes, it turns out that everything can burn, but not everything can burn.
Demonstration experience: "Fireproof scarf." (Rinse the handkerchief in water, then wring it out lightly and soak it well in alcohol. Grasp the handkerchief with crucible tongs and set it on fire. The alcohol will flare up, but the handkerchief will not burn.)
2-chemist: You have heard the proverb “There is no smoke without fire”, and I can prove the opposite.
Demonstration experience: "Smoke without fire." (The interaction of concentrated hydrochloric acid and ammonia.)
3-chemist: So I look at you and think: if we lived in the alchemical period, then we would be great wizards, and would be able to fool people with the help of these experiments. But more than that, we could easily get gold without even using the “philosopher’s stone.”
Demonstration experience: "Golden Knife" (Prepare an iron knife, cleaned with sandpaper. Dip this knife into a concentrated solution of copper sulfate. The knife becomes “golden.”)
4-chemist: Now, if I lived in the alchemical period, I would become a great surgeon and perform all operations without any pain.
Demonstration experience: "Inflicting a wound and healing it." (Moisten your hand with a solution of iron (III) chloride. After this, moisten some object (knife) with a solution of potassium thiocyanate and easily pass this object over your hand. A blood-red mark is formed.)
We operate without pain, although there will be a lot of blood.
Every operation requires sterilization.
We will moisten it generously with iodine so that everything is sterile.
Don't move around, patient! Give me the knife, assistant!
Look, blood is flowing in a trickle, not water.
But now I wipe my hand - there’s not a trace of the cut!
1-chemist: Ah, if I had lived in the alchemical period, I would have been a great fakir; because I can easily perform various tricks.
Demonstration experience: "Burning gunpowder." (Prepare gunpowder in advance: a mixture of 7 parts potassium nitrate, 1 part sulfur and 1 part coal. Place the mixture in a heap and set it on fire.)
Demonstration experience: "Volcano". (Decomposition of ammonium dichromate)
Demonstration experience: "Fire Blizzard" (In a round-bottomed flask, moisten the walls with ammonia in advance. Place chromium (III) oxide in a combustion spoon, heat it and throw it into the flask with ammonia. A whole sheaf of sparks is formed.)
2-chemist: And finally, we will try to surprise you with this:
Demonstration experience: "Production and explosion of detonating gas." (Use the method of displacing water into a jar to collect 2 volumes of hydrogen and 1 volume of oxygen. When the jar is filled, set the mixture of gases on fire with a splinter.)
3-chemist: Well, we showed only some chemical miracles. And we want to end our chemical fireworks with the chemists’ anthem:
We are destined to shed everything that pours.
Spill what cannot be spilled!
Our chemistry room is called!
We were born to love chemistry!
Higher and higher and higher
Red bromine flies to the skies
And whoever breathes this bromine,
He's turning red himself!
4-chemist: See you again!
Nomination: Organization of extracurricular activities
Work completed: Kozhura Ekaterina Viktorovna
KCO (regional education center) “School of Cosmonautics”
Chemistry teacher, I work according to the standard state curriculum and F.G.’s textbook. Feldman, G.E. Rudzitisa.
Home address: 662973 Zheleznogorsk – 3, st. Belorusskaya 49a apt. 42.
Address of the School of Cosmonautics: 62990 Zheleznogorsk, st. Krasnoyarskaya 36.
Email address: root @ shk. krasnoyarsk. su
Telephone: in Zheleznogorsk 8 – (297) – 9 – 45 – 65.
Fax machine: 231 (20202) – 9 – 45 – 65.
