Useful tips
Children are always trying to find out something new every day, and they always have a lot of questions.
They can explain some phenomena, or they can show clearly how this or that thing, this or that phenomenon works.
In these experiments, children will not only learn something new, but also learn create differentcrafts, with which they can then play.
1. Experiments for children: lemon volcano
You will need:
2 lemons (for 1 volcano)
Baking soda
Food coloring or watercolor paints
Dishwashing liquid
Wooden stick or spoon (if desired)
1. Cut off the bottom of the lemon so it can be placed on a flat surface.
2. On the back side, cut out a piece of lemon as shown in the image.
* You can cut off half a lemon and make an open volcano.
3. Take the second lemon, cut it in half and squeeze the juice into a cup. This will be the reserved lemon juice.
4. Place the first lemon (with the cut out part) on the tray and use a spoon to “squeeze” the lemon inside to squeeze out some of the juice. It is important that the juice is inside the lemon.
5. Add food coloring or watercolor inside the lemon, but do not stir.
6. Pour dish soap inside the lemon.
7. Add a spoonful to the lemon baking soda. The reaction will begin. You can use a stick or spoon to stir everything inside the lemon - the volcano will begin to foam.
8. To make the reaction last longer, you can gradually add more soda, dyes, soap and reserve lemon juice.
2. Home experiments for children: electric eels made from chewing worms
You will need:
2 glasses
Small capacity
4-6 gummy worms
3 tablespoons baking soda
1/2 spoon of vinegar
1 cup water
Scissors, kitchen or stationery knife.
1. Using scissors or a knife, cut lengthwise (precisely lengthwise - it won't be easy, but be patient) each worm into 4 (or more) pieces.
* The smaller the piece, the better.
*If the scissors do not cut properly, try washing them with soap and water.
2. Mix water and baking soda in a glass.
3. Add pieces of worms to the solution of water and soda and stir.
4. Leave the worms in the solution for 10-15 minutes.
5. Using a fork, transfer the worm pieces to a small plate.
6. Pour half a spoonful of vinegar into empty glass and start putting worms into it one by one.
* The experiment can be repeated if you wash the worms plain water. After a few attempts, your worms will begin to dissolve, and then you will have to cut a new batch.
3. Experiments and experiments: a rainbow on paper or how light is reflected on a flat surface
You will need:
Bowl of water
Clear nail polish
Small pieces of black paper.
1. Add 1-2 drops of clear nail polish to a bowl of water. Watch how the varnish spreads through the water.
2. Quickly (after 10 seconds) dip a piece of black paper into the bowl. Take it out and let it dry on a paper towel.
3. After the paper has dried (this happens quickly) start turning the paper and look at the rainbow that appears on it.
* To better see a rainbow on paper, look at it under the sun's rays.
4. Experiments at home: rain cloud in a jar
As small drops of water accumulate in a cloud, they become heavier and heavier. Eventually they will reach such a weight that they can no longer remain in the air and will begin to fall to the ground - this is how rain appears.
This phenomenon can be shown to children using simple materials.
You will need:
Shaving foam
Food coloring.
1. Fill the jar with water.
2. Apply shaving foam on top - it will be a cloud.
3. Have your child start dripping food coloring onto the “cloud” until it starts to “rain” - drops of coloring begin to fall to the bottom of the jar.
During the experiment, explain this phenomenon to your child.
You will need:
Warm water
Sunflower oil
4 food colors
1. Fill the jar 3/4 full with warm water.
2. Take a bowl and stir 3-4 tablespoons of oil and a few drops of food coloring in it. In this example, 1 drop of each of 4 dyes was used - red, yellow, blue and green.
3. Using a fork, stir the coloring and oil.
4. Carefully pour the mixture into a jar of warm water.
5. Watch what happens - the food coloring will begin to slowly fall through the oil into the water, after which each drop will begin to disperse and mix with the other drops.
* Food coloring dissolves in water, but not in oil, because... oil density less water(that’s why it “floats” on the water). The dye droplet is heavier than the oil, so it will begin to sink until it reaches the water, where it will begin to disperse and look like a small fireworks display.
6. Interesting experiments: ina circle in which the colors merge
You will need:
- printout of the wheel (or you can cut out your own wheel and draw all the colors of the rainbow on it)
Elastic band or thick thread
Glue stick
Scissors
Skewer or screwdriver (to make holes in the paper wheel).
1. Select and print the two templates you want to use.
2. Take a piece of cardboard and use a glue stick to glue one template to the cardboard.
3. Cut out the glued circle from cardboard.
4. TO back side Glue the second template onto the cardboard circle.
5. Use a skewer or screwdriver to make two holes in the circle.
6. Thread the thread through the holes and tie the ends into a knot.
Now you can spin your top and watch how the colors merge on the circles.
7. Experiments for children at home: jellyfish in a jar
You will need:
Small transparent plastic bag
Transparent plastic bottle
Food coloring
Scissors.
1. Place the plastic bag on a flat surface and smooth it out.
2. Cut off the bottom and handles of the bag.
3. Cut the bag lengthwise on the right and left so that you have two sheets of polyethylene. You will need one sheet.
4. Find the center of the plastic sheet and fold it like a ball to make a jellyfish head. Tie a thread in the area of the jellyfish's "neck", but not too tightly - you need to leave a small hole through which to pour water into the jellyfish's head.
5. There is a head, now let's move on to the tentacles. Make cuts in the sheet - from the bottom to the head. You need approximately 8-10 tentacles.
6. Cut each tentacle into 3-4 smaller pieces.
7. Pour some water into the jellyfish's head, leaving room for air so the jellyfish can "float" in the bottle.
8. Fill a bottle with water and put your jellyfish in it.
9. Add a couple drops of blue or green food coloring.
* Close the lid tightly to prevent water from spilling out.
* Let the children turn the bottle over and watch the jellyfish swim in it.
8. Chemical experiments: magic crystals in a glass
You will need:
Glass glass or bowl
Plastic bowl
1 cup Epsom salts (magnesium sulfate) - used in bath salts
1 cup hot water
Food coloring.
1. Place Epsom salts in a bowl and add hot water. You can add a couple of drops of food coloring to the bowl.
2. Stir the contents of the bowl for 1-2 minutes. Most of the salt granules should dissolve.
3. Pour the solution into a glass or glass and place it in the freezer for 10-15 minutes. Don't worry, the solution is not so hot that the glass will crack.
4. After freezing, transfer the solution to the main compartment of the refrigerator, preferably on the top shelf, and leave overnight.
The growth of crystals will be noticeable only after a few hours, but it is better to wait overnight.
This is what the crystals look like the next day. Remember that crystals are very fragile. If you touch them, they will most likely immediately break or crumble.
9. Experiments for children (video): soap cube
10. Chemical experiments for children (video): how to make a lava lamp with your own hands
Such a complex but interesting science as chemistry always causes an ambiguous reaction among schoolchildren. The children are interested in experiments that result in the production of substances of bright colors, the release of gases, or precipitation. Here are the complex equations chemical processes Only a few of them like to write.
The importance of entertaining experiences
According to modern federal standards, a curriculum subject such as chemistry has been introduced in secondary schools and has not been left without attention.
As part of the study of complex transformations of substances and solving practical problems, the young chemist hones his skills in practice. It is through unusual experiences that a teacher develops an interest in the subject in his students. But in regular lessons it is difficult for a teacher to find sufficient quantity free time for non-standard experiments, but there is simply no time to spend it for children.
To correct this, additional elective and optional courses were invented. By the way, many children who are interested in chemistry in the 8th and 9th grades become doctors, pharmacists, and scientists in the future, because in such classes the young chemist gets the opportunity to independently conduct experiments and draw conclusions from them.
What courses involve fun chemical experiments?
In the old days, chemistry for children was available only from the 8th grade. The children were not offered any special courses or extracurricular chemical activities. In fact, there was simply no work with gifted children in chemistry, which had a negative impact on the attitude of schoolchildren to this discipline. The children were afraid and did not understand complex chemical reactions, and made mistakes in writing ionic equations.
Due to the reform of the modern education system, the situation has changed. Now in educational institutions are also offered in lower grades. The children are happy to do the tasks that the teacher offers them and learn to draw conclusions.
Elective courses related to chemistry help high school students gain skills in working with laboratory equipment, and those designed for younger students contain bright, demonstrative chemical experiments. For example, children study the properties of milk and become familiar with the substances that are obtained when it sours.
Experiences related to water
Entertaining chemistry is interesting for children when, during the experiment, they see an unusual result: the release of gas, a bright color, an unusual precipitate. A substance such as water is considered ideal for conducting a variety of entertaining chemical experiments for schoolchildren.
For example, chemistry for 7-year-old children can begin with an introduction to its properties. The teacher tells the children that most of our planet is covered with water. The teacher also informs the students that in a watermelon there is more than 90 percent of it, and in a person it is about 65-70%. After telling schoolchildren how important water is for humans, you can offer them some interesting experiments. At the same time, it is worth emphasizing the “magic” of water in order to intrigue schoolchildren.
By the way, in this case standard set Chemistry for children does not involve any expensive equipment - it is quite possible to limit yourself to affordable devices and materials.
Experience "Ice Needle"
Let us give an example of such a simple and at the same time interesting experiment with water. This is the construction of an ice sculpture - a “needle”. For the experiment you will need:
- water;
- salt;
- ice cubes.
The duration of the experiment is 2 hours, so such an experiment cannot be carried out in a regular lesson. First you need to pour water into the ice tray, put it in freezer. 1-2 hours after the water turns into ice, entertaining chemistry may continue. For the experiment you will need 40-50 ready-made ice cubes.
First, children should arrange 18 cubes on the table in the form of a square, leaving a free space in the center. Next, after sprinkling them with table salt, they are carefully applied to each other, thus gluing them together.
Gradually all the cubes are connected, and the result is a thick and long “needle” of ice. To make it, 2 teaspoons are enough table salt and 50 small pieces of ice.
You can tint the water to make ice sculptures multi-colored. And as a result of such a simple experience, chemistry for 9-year-old children becomes an understandable and fascinating science. You can experiment by gluing ice cubes in the shape of a pyramid or diamond.
Experiment "Tornado"
This experiment does not require special materials, reagents or tools. The guys can do it in 10-15 minutes. For the experiment, let's stock up:
- plastic transparent bottle with a lid;
- water;
- dishwashing detergent;
- sparkles.
The bottle should be filled 2/3 with plain water. Then add 1-2 drops of dishwashing detergent to it. After 5-10 seconds, pour a couple of pinches of glitter into the bottle. Screw the cap tightly, turn the bottle upside down, holding it by the neck, and twist it clockwise. Then we stop and look at the resulting vortex. Before the “tornado” starts working, you will have to spin the bottle 3-4 times.
Why does a “tornado” appear in an ordinary bottle?
When a child makes circular movements, a whirlwind appears, similar to a tornado. The rotation of water around the center occurs due to the action of centrifugal force. The teacher tells the children about how scary tornadoes are in nature.
Such an experience is absolutely safe, but after it, chemistry for children becomes a truly fabulous science. To make the experiment more vivid, you can use a coloring agent, for example, potassium permanganate (potassium permanganate).
Experiment "Soap Bubbles"
Do you want to tell your children what fun chemistry is? Programs for children do not allow the teacher to pay due attention to experiments in lessons; there is simply no time for this. So, let's do this optionally.
For elementary school students, this experiment will bring a lot of positive emotions, and it can be done in a few minutes. We will need:
- liquid soap;
- jar;
- water;
- thin wire.
In a jar, mix one part liquid soap with six parts water. We bend the end of a small piece of wire in the form of a ring, lower it into soap mixture, carefully pull out and blow out of the mold a beautiful soap bubble of your own making.
For this experiment, only wire that does not have a nylon layer is suitable. Otherwise blow it out bubble children won't be able to.
To make it more interesting for the children, you can add soap solution food coloring. You can arrange soap competitions between schoolchildren, then chemistry for children will become a real holiday. The teacher thus introduces the children to the concept of solutions, solubility and explains the reasons for the appearance of bubbles.
Entertaining experience “Water from plants”
To begin with, the teacher explains how important water is for cells in living organisms. It is with the help of it that transportation takes place. nutrients. The teacher notes that if there is not enough water in the body, all living things die.
For the experiment you will need:
- alcohol lamp;
- test tubes;
- green leaves;
- test tube holder;
- copper sulfate (2);
- beaker.
This experiment will require 1.5-2 hours, but as a result, chemistry for children will be a manifestation of a miracle, a symbol of magic.
Green leaves are placed in a test tube and secured in a holder. In the flame of an alcohol lamp, you need to heat the entire test tube 2-3 times, and then do this only with the part where the green leaves are located.
The glass should be placed so that the gaseous substances released in the test tube fall into it. As soon as heating is completed, add grains of white anhydrous copper sulfate to the drop of liquid obtained inside the glass. Gradually White color disappears, and copper sulfate becomes blue or dark blue.
This experience brings children into complete delight, because before their eyes the color of substances changes. At the end of the experiment, the teacher tells the children about such a property as hygroscopicity. It is due to its ability to absorb water vapor (moisture) that white copper sulfate changes its color to blue.
Experiment "Magic Wand"
This experiment is suitable for an introductory lesson in an elective course in chemistry. First you need to make a star-shaped blank and soak it in a solution of phenolphthalein (indicator).
During the experiment itself, attached to " magic wand"The star is first immersed in an alkali solution (for example, in a solution of sodium hydroxide). Children see how in a matter of seconds its color changes and a bright crimson color appears. Next, the colored form is placed in an acid solution (for the experiment, it would be optimal to use a solution of hydrochloric acid ), and the crimson color disappears - the star becomes colorless again.
If the experiment is carried out for children, during the experiment the teacher tells a “chemical tale”. For example, the hero of a fairy tale could be an inquisitive mouse who wanted to find out why there are so many bright flowers in a magical land. For students in grades 8-9, the teacher introduces the concept of “indicator” and notes which indicators can determine the acidic environment, and which substances are needed to determine the alkaline environment of solutions.
"Genie in a Bottle" Experience
This experiment is demonstrated by the teacher himself, using a special fume hood. The experience is based on the specific properties of concentrated nitric acid. Unlike many acids, concentrated nitric acid is capable of chemical interaction with metals located after hydrogen (with the exception of platinum and gold).
You need to pour it into a test tube and add a piece of copper wire there. Under the hood, the test tube is heated, and the children observe the appearance of “red gin” vapors.
For students in grades 8-9, the teacher writes an equation chemical reaction, identifies signs of its occurrence (change in color, appearance of gas). This experiment is not suitable for demonstration outside the walls of a school chemistry lab. According to safety regulations, it involves the use of vapors of nitrogen oxide (“brown gas”) that pose a danger to children.
Home experiments
In order to whet the interest of schoolchildren in chemistry, you can offer a home experiment. For example, conduct an experiment on growing table salt crystals.
The child must prepare a saturated solution of table salt. Then place a thin twig in it, and as the water evaporates from the solution, crystals of table salt will “grow” on the twig.
The jar of solution should not be shaken or rotated. And when the crystals grow after 2 weeks, the stick must be very carefully removed from the solution and dried. And then, if desired, you can coat the product with colorless varnish.
Conclusion
There is no more interesting subject in the school curriculum than chemistry. But in order for children not to be afraid of this complex science, the teacher must devote sufficient time in his work to entertaining experiences and unusual experiments.
It is the practical skills that are formed during such work that will help stimulate interest in the subject. And in the lower grades entertaining experiments are considered according to Federal State Educational Standards as independent project and research activities.
How to interest a child in learning new substances and properties of various objects and liquids? You can set up an impromptu chemical laboratory at home and conduct simple chemical experiments for children at home.
The transformations will be original and appropriate in honor of any festive event or in the most normal conditions to familiarize the child with the properties of different materials. Here are some simple tricks that are easy to do at home.
Chemical experiments using ink
Take a small container of water, preferably one with transparent walls.
Dissolve a drop of ink or ink in it - the water will turn blue.
Add one tablet to the solution activated carbon pre-shredded.
Then shake the container well and you will see that it will gradually become light, without a tint of paint. Coal powder has an absorbent property, and the water returns to its original color.
https://galaset.ru/holidays/contests/tests.htmlTrying to create clouds at home
Take a tall jar and pour some hot water into it (about 3 cm). Prepare ice cubes in the freezer and place them on a flat baking sheet that you place on top of the jar.
The hot air in the jar will cool, forming water vapor. The condensate molecules will begin to gather together in the form of a cloud. This transformation demonstrates the origin of clouds in nature when it cools warm air. Why is it raining?
Drops of water on the ground heat up and rise upward. There they cool and meet each other to form clouds. Then the clouds also combine into heavy formations and fall to the ground as precipitation. Watch a video of chemical experiments for children at home.
How your hands feel at different water temperatures
You will need three deep bowls of water - cold, hot and room temperature.
The child should touch cold water with one hand and hot water with the other.
After a couple of minutes, both hands are placed in a vessel with water at room temperature. How does water feel to him? Is there a difference in perception temperature?
Water can be absorbed and stain the plant.
This beautiful transformation will require a live plant or flower stem.
Place it in a glass of water colored in any bright color (red, blue, yellow).
Gradually you will notice that the plant takes on the same color.
This happens because the stem absorbs water and takes on its color. In the language of chemical phenomena, such a process is usually called osmosis or one-way diffusion.
You can make your own fire extinguisher at home
Necessary actions:
- Let's take a candle.
- It is necessary to light it and place it in the jar so that it stands straight and the flame does not reach its edges.
- Carefully place a teaspoon of baking powder into the jar.
- Then pour a little vinegar into it.
Next we look at the transformation - White powder baking powder will hiss, forming foam, and the candle will go out. This interaction between the two substances produces carbon dioxide. It sinks to the bottom of the jar because it is heavy compared to other atmospheric gases.
The fire does not receive oxygen and goes out. This is the principle behind the fire extinguisher. They all contain carbon dioxide, which extinguishes the flames of fire.
What else you should definitely read:
Oranges have the ability to float on water
If you put an orange in a bowl of water, it will not sink. Clean it and dip it in water again - you will see it at the bottom. How did this happen?
The orange peel has air bubbles that keep it floating on the water, almost like an air mattress.
Testing eggs for their ability to float on water
We use jars of water again. Place a couple of tablespoons of salt in one of them and stir until dissolved. Dip an egg into each jar. In salt water it will be on the surface, and in normal water it will sink to the bottom.
Did you know that May 29 is Chemist's Day? Who among us in childhood did not dream of creating unique magic, amazing chemical experiments? It's time to make your dreams come true! Read on quickly and we will tell you how to have fun on Chemist Day 2017, as well as what chemical experiments for children can be easily done at home.
Home volcano
If you are not already attracted, then... Do you want to see a volcanic eruption? Try it at home! To arrange a chemical experiment “volcano” you will need soda, vinegar, food coloring, plastic cup, cup warm water.
IN a plastic cup pour 2-3 tablespoons of baking soda, add ¼ cup of warm water and a little food coloring, preferably red. Then add ¼ vinegar and watch the volcano “erupt”.
Rose and ammonia
A very interesting and original chemical experiment with plants can be seen in the video from YouTube:
Self-inflating balloon
Do you want to conduct safe chemical experiments for children? Then you will definitely like the balloon experiment. Prepare in advance: a plastic bottle, baking soda, balloon and vinegar.
Pour 1 teaspoon of baking soda inside the ball. Pour ½ cup of vinegar into the bottle, then put a ball on the neck of the bottle and make sure that the soda gets into the vinegar. As a result of a violent chemical reaction, which is accompanied by the active release of carbon dioxide, the balloon will begin to inflate.
Pharaoh snake
For the experiment you will need: calcium gluconate tablets, dry fuel, matches or gas-burner. Watch the algorithm of actions on YouTube video:
Colorful magic
Do you want to surprise your child? Hurry up and conduct chemical experiments with color! You will need the following available ingredients: starch, iodine, transparent container.
Mix snow-white starch and brown iodine in a container. The result is an amazing mixture of blue.
Raising a snake
The most interesting home chemical experiments can be carried out using available ingredients. To create a snake you will need: a plate, river sand, powdered sugar, ethyl alcohol, a lighter or burner, baking soda.
Place a pile of sand on a plate and soak it in alcohol. Make a hole in the top of the slide, where you carefully add powdered sugar and soda. Now we set fire to the sand slide and watch. After a couple of minutes, a dark wriggling ribbon that resembles a snake will begin to grow from the top of the slide.
How to spend chemical experiments look at you with an explosion next video from Youtube:
Paper, scissors, heat source.
This experiment always surprises kids, but to make it more interesting for two-year-olds, combine it with creativity. Cut out a spiral from paper, color it together with your child so that it looks like a snake, and then start “revitalizing” it. This is done very simply: place a heat source below, for example, a burning candle, electric stove(or hob), iron with the sole upside down, incandescent lamp, heated dry frying pan. Place a coiled snake on a string or wire above the heat source. After a few seconds, it will “come to life”: it will begin to rotate under the influence of warm air.
For children 3 years old:rain in a jar 
Three-liter jar, hot water, plate, ice.
Using this experience, it is easy to explain to a three-year-old “scientist” the simplest phenomena of nature. Fill the jar about 1/3 full hot water, better hot. Place a plate of ice on the neck of the jar. And then - everything is as in nature - the water evaporates, rises upward in the form of steam, at the top the water cools and a cloud forms, from which real rain comes. IN three-liter jar It will rain for one and a half to two minutes.
For children 4 years old:balls and rings
Alcohol, water, vegetable oil, syringe.
Four-year-old children are already wondering how everything works in nature. Show them a beautiful and exciting experiment about weightlessness. On preparatory stage mix alcohol with water, you should not involve your child in this, just explain that this liquid is similar in weight to oil. After all, it is the oil that will be poured into the prepared mixture. You can take any vegetable oil, but pour it very carefully from a syringe. As a result, the oil appears to be in weightlessness and takes its natural shape - the shape of a ball. The child will be surprised to observe a round transparent ball in the water. With a four-year-old child, you can already talk about the force of gravity, which causes liquids to spill and spread, and about weightlessness, because all liquids in space look like balls. As a bonus, show your child one more trick: if you insert a rod into the ball and rotate it quickly, an oil ring will separate from the ball.
For children 5 years old:invisible ink
Milk or lemon juice, brush or feather, hot iron.
At five years old, the child probably already owns a brush. Even if he doesn't know how to write yet, he can draw a secret letter. Then the message will also be encrypted. Modern children did not read the story about Lenin and the inkwell with milk in school, but observe the properties of milk and lemon juice it will be no less interesting for them than for their parents in childhood. The experience is very simple. Dip the brush into milk or lemon juice (or better yet, use both liquids, then the quality of the “ink” can be compared) and write something on a piece of paper. Then dry the writing until the paper looks clean and heat the sheet. The most convenient way to develop recordings is with an iron. Onion or apple juice is suitable as ink.
For children 6 years old:rainbow in a glass
Sugar, food colorings, several transparent glasses.
The experiment may seem too simple for a six-year-old, but in fact it is worth the painstaking work for a patient “scientist.” The good thing about it is that the young scientist can do most of the manipulations himself. Three tablespoons of water and dyes are poured into four glasses: in different glasses- different colors. Then add a spoonful of sugar to the first glass, two spoons to the second, three to the third, and four to the fourth. The fifth glass remains empty. 3 tablespoons of water are poured into glasses placed in order and mixed thoroughly. Then a few drops of one paint are added to each glass and mixed. Remains in the fifth glass pure water without sugar and dye. Carefully, along the blade of a knife, pour the contents of the “colored” glasses into a glass of clean water as the “sweetness” increases, that is, scientifically, the saturation of the solution. And if you did everything correctly, then the glass will contain a small sweet rainbow. If you want to talk science, tell your child about the difference in the density of liquids, due to which the layers do not mix.
For children 7 years old:egg in a bottle
Chicken egg, bottle pomegranate juice, hot water or paper with matches.
The experiment is practically safe and very simple, but quite effective. The child will be able to carry out most of it himself; an adult should only help with hot water or fire.
The first step is to boil the egg and peel it. And then there are two options. The first is to pour hot water into a bottle, put an egg on top, then put the bottle in cold water(into ice) or just wait until the water cools down. The second way is to throw burning paper into the bottle and put an egg on top. The result will not be long in coming: as soon as the air or water inside the bottle cools, it will begin to shrink, and before the novice “physicist” has time to blink, the egg will be inside the bottle.
Be careful and do not trust your child to pour hot water or work with fire himself.
For children 8 years old:"Pharaoh's Snake"
Calcium gluconate, dry fuel, matches or lighter.
There are many ways to get “pharaoh snakes”. We will tell you about one that an eight-year-old child can do. The smallest and safest, but quite spectacular “snakes” are obtained from ordinary calcium gluconate tablets; they are sold in pharmacies. To make them turn into snakes, set the pills on fire. The simplest and safe way to do this is to put a few cups of calcium gluconate on a “dry fuel” tablet, which is sold in tourist stores. When burning, the tablets will begin to expand sharply and move like living reptiles due to the release of carbon dioxide, so from a scientific point of view, the experiment can be explained quite simply.
By the way, if “snakes” made from gluconate do not seem very scary to you, try making them from sugar and soda. In this version, a pile of sifted river sand is soaked in alcohol, and sugar and soda are placed in a recess on its top, then the sand is set on fire.
It would not be amiss to remind you that all manipulations with fire are carried out away from flammable objects, strictly under the supervision of an adult and very carefully.
For children 9 years old:non-Newtonian fluid
Starch, water.
This is an amazing experiment, which is easy to do, especially if the scientist is already 9. The research is serious. The goal is to obtain and study a non-Newtonian fluid. This is a substance that, when exposed to a soft influence, behaves like a liquid, and when exposed to a strong influence, exhibits the properties of a solid. In nature, quicksand behaves in a similar way. At home - a mixture of water and starch. In a bowl, combine water with corn or potato starch in a ratio of 1:2 and mix well. You will see how the mixture resists when stirred quickly, and stirs when stirred gently. Throw a ball into a bowl with the mixture, lower the toy into it, and then try to pull it out sharply, take the mixture in your hands and let it calmly flow back into the bowl. You yourself can come up with many games with this amazing composition. And this great occasion Together with your child, figure out how molecules in different substances are connected to each other.
For children 10 years old:water desalination
Salt, water, plastic film, glass, pebbles, basin.
This study is best suited for those who love travel and adventure books and films. After all, while traveling, a situation may occur when the hero finds himself on the open sea without drinking water. If the traveler is already 10 and learns how to do this trick, he will not be lost. To experiment, first prepare salt water, that is, simply pour water into a deep basin and salt it “by eye” (the salt should completely dissolve). Now place a glass in our “sea”, so that the edges of the glass are slightly above the surface salt water, but were lower than the edges of the basin, and put a clean pebble or glass ball into the glass, which will prevent the glass from floating. Cover the basin with cling film or greenhouse film and tie its edges around the basin. It should not be pulled too tightly so that it is possible to make a depression (this depression is also fixed with a stone or a glass ball). It should be just above the glass. Now all that remains is to place the basin in the sun. The water will evaporate, settle on the film and flow down the slope into the glass - this will be an ordinary drinking water, all the salt will remain in the basin. The beauty of this experience is that the child can do it completely independently.
For children 11 years old:litmus cabbage
Red cabbage, filter paper, vinegar, lemon, soda, Coca-Cola, ammonia etc.
Here the child will have the opportunity to get acquainted with real chemical terms. Any parent remembers such a thing as litmus paper from chemistry course, and will be able to explain that this is an indicator - a substance that reacts differently to the level of acidity in other substances. A child can easily make such indicator papers at home and, of course, test them by checking the acidity in various household liquids.
The easiest way is to make an indicator from a regular red cabbage. Grate the cabbage and squeeze out the juice, then soak filter paper with it (available at a pharmacy or wine shop). The cabbage indicator is ready. Now cut the pieces of paper smaller and place them in different liquids that you can find at home. All that remains is to remember which color corresponds to which acidity level. In an acidic environment the paper will turn red, in a neutral environment it will turn green, and in an alkaline environment it will turn blue or purple. As a bonus, try cooking “alien” scrambled eggs by adding to egg white red cabbage juice. At the same time, you will find out what level of acidity is in a chicken egg.
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