All children, without exception, love mysterious, mysterious and unusual phenomena... Most of the children really like to conduct interesting experiments, some of which do not ask their parents or other adults for help.
Experiences with children
Not all experiences are suitable for children. Some of them can be dangerous to the life and health of babies, especially preschool age... However, under the supervision and supervision of a parent or other adult, the child can perform any entertaining experiment- the main thing is to carefully monitor compliance with the necessary safety requirements.
Everything scientific experiments are extremely useful for children. They allow young inventors to visually familiarize themselves with the properties various substances and items chemical compounds and much more, to understand the causes of certain phenomena and gain valuable practical experience that can be applied in later life. In addition, some of these experiments can be shown as magic tricks, so that the child can gain credibility with his friends and acquaintances.
Experiments with water for children
All people in everyday life very often use water and do not think at all that it has truly magical and amazing properties. Meanwhile, this liquid can be enjoyed incredibly with children. For example, boys and girls at home can do the following experiments:
Experiments with fire for children
Special care should be taken with fire, but it is with it that incredibly interesting experiences for children can be made. Try one of the following experiments with your offspring:
Experiments with salt for children
Entertaining experiments for children can be carried out with bulk substances, for example, with salt. The guys will definitely like experiments such as:
Experiments with soda for children
No less spectacular experiments for children can be done with baking soda, for example, "Volcano". Place a small plastic bottle on the table and sculpt a volcano out of clay or sand around it. Pour 2 tablespoons of baking soda into a container, add approximately 50-70 ml warm water, a few drops of red food coloring, and at the very end - a quarter cup of vinegar. A real volcanic eruption will take place in front of your eyes, and the child will be delighted.
Other experiments for children with baking soda can be built on the property of this substance to crystallize. To obtain crystals, can be used in the same way as in the case of salt. To do this, it is necessary to prepare a dense soda solution in which the granular substance no longer dissolves, and then place a metal wire or other object there and leave it in a warm place for several days. The result will not be long in coming.
Balloon experiments for kids
Often, experiments and experiments for children are associated with different properties balloons, such as:
Experiments with eggs for children
Some interesting experiments with children can be done using chicken eggs, for example:
Experiments with lemon for children
Anything can be used to conduct experiments. Interesting experiments with lemon deserve special attention, for example:
Experiments with paints for children
All kids love to draw, but it will be even more interesting for them to conduct entertaining experiments with paints. Try one of the following experiments:
And together with them learn peace and wonders physical phenomena? Then we invite you to our "experimental laboratory", in which we will tell you how to create simple, but very interesting experiments for children.
Egg Experiments
Salted egg
The egg will sink to the bottom if you place it in a glass of plain water, but what happens if you add salt? The result is very interesting and can clearly show interesting facts about density.
You will need:
- Salt
- Tumbler.
Instructions:
1. Fill half the glass with water.
2. Add a lot of salt to the glass (about 6 tablespoons).
3. We interfere.
4. We carefully lower the egg into the water and watch what happens.
Explanation
Salt water has a higher density than regular tap water. It is the salt that brings the egg to the surface. And if you add fresh salt to the existing salt water, then the egg will gradually sink to the bottom.
Egg in a bottle
Did you know that a boiled whole egg can be easily placed in a bottle?
You will need:
- Bottle with a neck diameter smaller than that of an egg
- Hard boiled egg
- Matches
- Some paper
- Vegetable oil.
Instructions:
1. Lubricate the neck of the bottle with vegetable oil.
2. Now set fire to the paper (you can just have a few matches) and immediately throw it into the bottle.
3. Place an egg on the neck.
When the fire goes out, the egg will be inside the bottle.
Explanation
The fire causes the air in the bottle to heat up and escape. After the fire is extinguished, the air in the bottle will begin to cool and contract. Therefore, a low pressure is generated in the bottle, and the external pressure pushes the egg into the bottle.
Ball experiment
This experience shows how rubber and orange peel interact.
You will need:
- Balloon
- Orange.
Instructions:
1. Inflate the balloon.
2. Peel the orange, but do not discard the orange peel (zest).
3. Squeeze the orange zest over the ball and it will burst.
Explanation.
Orange peel contains the substance limonene. He is able to dissolve rubber, which is what happens with the ball.
Candle Experiment
An interesting experiment showing ignition of a candle in the distance.
You will need:
- Regular candle
- Matches or a lighter.
Instructions:
1. Light a candle.
2. Put it out after a few seconds.
3. Now bring the burning flame to the smoke coming from the candle. The candle will start burning again.
Explanation
The smoke rising up from an extinguished candle contains paraffin, which quickly ignites. The burning paraffin vapor reaches the wick, and the candle starts burning again.
Soda with vinegar
A balloon that inflates itself is a very interesting sight.
You will need:
- Bottle
- A glass of vinegar
- 4 teaspoons of baking soda
- Balloon.
Instructions:
1. Pour a glass of vinegar into the bottle.
2. We put soda in a ball.
3. We put the ball on the neck of the bottle.
4. Slowly set the ball upright, while pouring the baking soda into the bottle with vinegar.
5. We observe how the balloon is inflated.
Explanation
When you add baking soda to vinegar, a process called soda quenching takes place. During this process, carbon dioxide is released, which inflates our balloon.
Invisible ink
Play with your child as a secret agent and create your invisible ink.
You will need:
- Half lemon
- Spoon
- A bowl
- Cotton swab
- White paper
- Lamp.
Instructions:
1. Squeeze some lemon juice into a bowl and add the same amount of water.
2. Dip a cotton ball into the mixture and write something on white paper.
3. Wait for the juice to dry and become completely invisible.
4. When you're ready to read a secret message or show it to someone else, heat the paper by holding it close to a light bulb or fire.
Explanation
Lemon juice is an organic substance that oxidizes and turns brown when heated. Diluted lemon juice in water makes it difficult to see on paper, and no one will know there is lemon juice in there until it warms up.
Other substances which work on the same principle:
- Orange juice
- Milk
- Onion juice
- Vinegar
- Wine.
How to make lava
You will need:
- Sunflower oil
- Juice or food coloring
- Transparent vessel (glass can be used)
- Any effervescent tablet.
Instructions:
1. First, pour the juice into a glass so that it fills about 70% of the container volume.
2. Fill the rest of the glass with sunflower oil.
3. Now we are waiting for the juice to separate from the sunflower oil.
4. We throw a pill into a glass and observe an effect similar to lava. When the tablet has dissolved, you can throw another one.
Explanation
The oil separates from the water as it has a lower density. Dissolving in the juice, the tablet emits carbon dioxide, which captures parts of the juice and lifts it up. The gas exits completely from the glass when it reaches the top, causing the juice particles to fall back down.
The tablet fizzes due to what it contains citric acid and soda (sodium bicarbonate). Both of these ingredients react with water to form sodium citrate and carbon dioxide gas.
Ice experiment
At first glance, you might think that the ice cube, being on top, will eventually melt, due to which it should cause the water to spill, but is this really so?
You will need:
- Cup
- Ice cubes.
Instructions:
1. Fill the glass warm water to the very edge.
2. Lower the ice cubes carefully.
3. Observe the water level carefully.
As the ice melts, the water level does not change at all.
Explanation
When water freezes, turning into ice, it expands, increasing its volume (which is why even heating pipes). The water from the melted ice takes less space than the ice itself. So when the ice cube melts, the water level remains about the same.
How to make a parachute
find out about air resistance, by making a small parachute.
You will need:
- Plastic bag or other lightweight material
- Scissors
- Small load (possibly some kind of figurine).
Instructions:
1. Cut out a large square from a plastic bag.
2. Now we cut off the edges so that we get an octagon (eight equal sides).
3. Now attach 8 strands to each corner.
4. Remember to make a small hole in the middle of the parachute.
5. Tie the other ends of the threads to a small weight.
6. We use a chair or find a high point to launch the parachute and check how it flies. Remember to fly the parachute as slowly as possible.
Explanation
When the parachute is deployed, the load pulls it down, but with the help of the lines, the parachute takes up a large area that resists the air, due to which the load slowly descends. How larger area the surface of the parachute, the more this surface resists falling, and the slower the parachute will descend.
A small hole in the middle of the parachute allows air to slowly flow through it rather than bouncing the parachute to one side.
How to make a tornado
Find out, how to make a tornado in a bottle with this fun science experiment for kids. The objects used in the experiment are easy to find in everyday life. Home made mini tornado much safer than the tornado that is shown on television in the steppes of America.
August 2nd, 2015
Children are always trying to learn something new every day and they always have a lot of questions. They can explain some phenomena, and you can clearly show how this or that thing, this or that phenomenon works. In these experiments, children not only learn something new, but also learn to create different crafts, with which they will be able to play further.
1. Experiments for children: lemon volcano
You will need:
2 lemons (for 1 volcano)
Baking soda
Food colors or watercolors
Dishwashing liquid
Wooden stick or spoon (optional)
1. Cut lower part lemon so that it can be put on flat surface.
2. Cut a slice of lemon from the back as shown in the image.
* You can cut off half a lemon and make an open volcano.
3. Take a second lemon, cut it in half, and squeeze the juice out of it into a cup. This will be your backup lemon juice.
4. Place the first lemon (with the cut out) on the tray and spoon the lemon inside to squeeze out some juice. It is important that the juice is inside the lemon.
5. Add food coloring or watercolor to the inside of the lemon, but do not stir.
6. Pour dish soap into the lemon.
7. Add a spoonful of baking soda to the lemon. A reaction will begin. You can stir everything inside the lemon with a stick or spoon - the volcano will begin to foam.
8. To make the reaction last longer, you can gradually add more baking soda, dyes, soap and reserve lemon juice.
2. Home experiments for children: electric eels from chewing worms
You will need:
2 glasses
Small capacity
4-6 chewing worms
3 tablespoons of baking soda
1/2 spoon of vinegar
1 cup of water
Scissors, kitchen or stationery knife.
1. Using scissors or a knife, cut lengthwise (exactly along - it will not be easy, but be patient) of each worm into 4 (or more) parts.
* The smaller the piece, the better.
* If the scissors don't want to cut properly, try washing them with soap and water.
2. Stir water and baking soda in a glass.
3. Add pieces of worms to the water and baking soda solution and stir.
4. Leave the worms in the solution for 10-15 minutes.
5. Use a fork to transfer the worm pieces to a small plate.
6. Pour half a spoonful of vinegar into an empty glass and begin placing the worms in it one by one.
* The experiment can be repeated if the worms are washed with plain water. After a few tries, 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:
A bowl of water
Clear nail polish
Small pieces of black paper.
1. Add 1 to 2 drops of clear nail polish to a bowl of water. See how the varnish disperses in the water.
2. Quickly (after 10 seconds) dip a piece of black paper into a bowl. Take it out and let it dry on a paper towel.
3. After the paper is dry (this happens quickly), start turning the paper and look at the rainbow that is displayed on it.
* To get a better view of the rainbow on paper, look at it in the sun.
4. Experiments at home: rain cloud in the bank
When small water droplets accumulate in a cloud, they become heavier and heavier. As a result, they will reach such a weight that they can no longer remain in the air and 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 - this will be a cloud.
3. Let the child begin to drip food coloring onto the "cloud" until it "rains" - the drops of color begin to fall to the bottom of the jar.
Explain this phenomenon to your child during the experiment.
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 in 3-4 tablespoons of oil and a few drops of food coloring. V this example 1 drop of each of 4 dyes was used - red, yellow, blue and green.
3. Stir the dyes and oil with a fork.
4. Pour the mixture gently into a jar of warm water.
5. See what happens - the food coloring will slowly sink through the oil into the water, after which each drop will begin to scatter and mix with the other drops.
* Food coloring is water soluble, but not oil soluble. the density of oil is less than water (that's why it "floats" on water). A drop of dye is heavier than oil, so it will submerge until it reaches the water, where it begins to dissipate and resemble a small fireworks display.
6. Interesting experiences: ina push in which colors merge
You will need:
- wheel printout (or you can cut your wheel and paint all the colors of the rainbow on it)
Elastic band or thick thread
Glue stick
Scissors
A 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 the cardboard.
4. Glue the second template to the back of the cardboard circle.
5. Use a skewer or screwdriver to make two holes in the circle.
6. Pass the thread through the holes and tie the ends into a knot.
Now you can spin your top and watch the colors merge on the circles.
7. Experiments for children at home: jellyfish in a jar
You will need:
Small transparent plastic bag
Clear plastic bottle
Food coloring
Scissors.
1. Place a plastic bag on a flat surface and flatten it.
2. Cut off the bottom and handles of the bag.
3. Cut the bag lengthwise to the right and left to create 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 around the jellyfish's neck, but not too tight - you need to leave a small hole to pour water into the jellyfish's head through.
5. There is a head, now let's move on to the tentacles. Make cuts in the sheet from bottom to top. 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 to float in the bottle.
8. Fill a bottle with water and put your jellyfish in it.
9. Add a few drops of blue or green food coloring.
* Close the lid tightly to prevent water spilling out.
* Have 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 tumbler or bowl
Plastic bowl
1 cup Epsom Salt (magnesium sulfate) - used in bath salts
1 cup hot water
Food coloring.
1. Pour Epsom salt into a bowl and add hot water. You can add a few drops of food coloring to the bowl.
2. Stir the contents of the bowl for 1 to 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 isn't hot enough to crack the glass.
4. After freezing, transfer the solution to the main compartment of the refrigerator, preferably to the top shelf, and let it sit overnight.
The growth of crystals will be noticeable only after a few hours, but it is better to wait out the night.
This is what the crystals look like the next day. Remember that crystals are very fragile. If touched, they will most likely break or crumble immediately.
Who said physics and chemistry only start in high school? Even very young children are able to appreciate the beauty of these sciences. If your young chemist or physicist does not know how to speak yet, he can participate in exciting experiments. And then - more: every year the experiments become more exciting and more difficult, so you can start at any age. But before you open your home laboratory, it is worth remembering a few simple rules: there should always be order in the laboratory before, during and after the experiment; be careful when handling reagents, flammable liquids and sharp-edged objects; all experiments should be carried out in the presence of adults, in a ventilated room and strictly according to the instructions. Nowadays there are quite a lot of textbooks on homegrown physics and chemistry on sale, but in practice experiments from such publications either do not work out, or require serious reagents. We have selected scientific experiments that are safe, accessible to children by age, and do not require any special purchases of reagents from adults.
2 years. Living Spiral
What you need: paper, scissors, heat source.
This experience always surprises kids, but to make it more interesting for two-year-olds, you can combine it with creativity. You need to cut a spiral out of paper, paint it with the child so that it looks like a snake, and then proceed to "revitalize" kite... This is done very simply: you need to place a heat source below, it can be a burning candle, electric stove(or hob), iron upside down, incandescent lamp, preheated dry frying pan. Place a spiral snake over the heat source on a string or wire. In a few seconds it will "come to life": it will start to rotate under the influence of warm air.
3 years. Rain in the bank
What you need: a three-liter jar, hot water, a plate, ice.
With the help of this experience, one can easily explain to a three-year-old "scientist" the simplest natural phenomena. You need to pour into the jar about 1/3 hot water, better hot. Put a plate of ice on the neck of the jar. And then - everything is like in nature - the water evaporates, rises up in the form of steam, above the water cools and a cloud is formed, from which there is a real rain. V three-liter jar it will rain for one and a half to two minutes, then the water will cool down. And be careful with hot water!
4 years. Balls and rings
What you need: alcohol, water, vegetable oil, syringe.
Four-year-old children are already thinking about how everything works in nature. You can show them a beautiful and fascinating experiment about weightlessness. On preparatory stage you need to mix alcohol with water, you should not involve a child in this, it is enough to 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 in very carefully from a syringe. As a result, the oil appears to be in zero gravity and takes on its natural shape - the shape of a ball. The child will be surprised to observe the round transparent ball in water. With a four-year-old baby, you can already talk about the force of gravity, which makes liquids spill and spread, and about weightlessness, because it is in the form of balls that all liquids in space look. As a bonus, you can show the child another trick: if you stick a rod into the ball and rotate it quickly, you can watch the oil ring separate from the ball.
5 years. Invisible ink
What you need: milk or lemon juice. Brush or feather. Hot iron.
At five years old, your little one probably already owns a brush. Even if he still cannot write the secret letter on his own, he can draw it. Then the message will also be encrypted. Modern children have not read the story about Lenin and the inkwell with milk at school, but observing the properties of milk and lemon juice will be no less interesting for them than for their parents in childhood. The experience is very simple. You need to dip the brush in milk or lemon juice (and it is better to use both liquids, then the quality of the "ink" can be compared) and write something on a piece of paper. Then the letters need to be dried to make the paper look clean, and then just heat the sheet. You can use a candle, but then the experience becomes a fire hazard, and the secret message can overheat and burn. Therefore, it is most convenient to develop the notes with an iron. You can also use onion or apple juice as ink.
6 years. Rainbow in a glass
What you need: sugar, food coloring, a few clear glasses.
The experience may seem too simple for a six-year-old, but in reality it is worth the painstaking work for a patient "scientist." This experience is good because a 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 tablespoons to the second, three to the third, and four to the fourth. The fifth glass remains empty. In glasses, put in order, pour 3 tablespoons of water and mix thoroughly. Then a few drops of one paint are added to each glass and mixed. In the fifth glass remains pure water without sugar and dye. Carefully, along the blade of a knife, you need to pour into a glass with clean water the contents of the "colored" glasses as the "sweetness" increases, that is, scientifically, the saturation of the solution. And if you did everything right, then there will be a small sweet rainbow in the glass. If you want scientific conversations, you can tell your child about the difference in density of liquids, due to which the layers do not mix.
7 years. Egg in a bottle
What do you need: egg, a bottle of pomegranate juice, hot water or paper with matches.
The experience is practically safe and very simple, but quite effective. A child will be able to spend 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 for experience. You can pour into a bottle of hot water, 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 down, it will begin to shrink, and before our novice "physicist" has time to blink, the egg will be inside the bottle.
Be careful not to trust your child to pour hot water or handle the fire.
8 years. "Pharaoh's snake"
What you need: calcium gluconate, dry fuel, matches or a lighter.
There are many ways to get “Pharaoh's serpents”. But we will talk about what an eight-year-old child can do (naturally, in the presence and under the supervision of an adult). The smallest and safest, but quite effective "snakes" are obtained from ordinary tablets of calcium gluconate, they are sold in a pharmacy. In order for them to turn into snakes, you just need to set fire to the pills. The simplest and safe way to do this, place a few mugs of calcium gluconate on a "dry fuel" tablet that is sold in tourist stores. When burning, the tablets will begin to grow sharply and move, like living reptiles, due to the release of carbon dioxide, so from the point of view of science, the experience is explained quite simply.
By the way, if the "snakes" from gluconate seemed not very scary to you, you can try to repeat the experiment using sugar and soda. In this version of the experiment, a slide of sifted river sand it is soaked in alcohol, and sugar and soda are placed in a depression at its top, then the sand must be set on fire.
It will not be superfluous to recall that all manipulations with fire should be carried out away from flammable objects, strictly under the supervision of an adult and very carefully.
9 years. Non-newtonian fluid
What you need: starch, water.
This is an amazing experiment, which is very easy to do, especially if the experimenter is already 9. Research is serious. The purpose of the experiment is to obtain and study a non-Newtonian fluid. This is a substance that, under mild action, behaves like a liquid, and under strong action, it exhibits the properties of a solid. In nature, quicksand behaves in a similar way. And at home - a mixture of water and starch. In a bowl, you just need to combine water with corn or potato starch in a 1: 2 ratio and mix well. You will see the mixture resist when stirring quickly, and stirring gently. Try throwing a ball into a bowl with the mixture, lowering the toy into it, and then trying to pull it out sharply, put the mixture in your hands and let it calmly drain back into the bowl. You yourself can come up with a lot of games with this amazing lineup. And this is a great reason to figure out, together with the child, how molecules in different substances are related to each other.
10 years. Water desalination
What you need: salt, water, polyethylene film, a glass, pebbles, a basin.
This experience is best for those who love travel and adventure books and films. Indeed, on a journey, a situation may well arise when the hero finds himself in the open sea without drinking water. If the traveler is already 10, and he learns to do this experience, he will not be lost. For experience, you must first cook salt water, that is, simply pour water into a deep basin and salt it "by eye" (the salt should completely dissolve). Now we need to put a glass in our "sea" so that the edges of the glass are slightly above the surface of the salt water, but lower than the edges of the basin, and put a clean pebble or glass ball in the glass, which will prevent the glass from floating. Now you need to cover the basin with cling film or greenhouse wrap and tie its edges around the pelvis. It is not necessary to pull it 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 right above the glass. Now it remains to put the basin in the sun. The water evaporates, settles on the film and flows down the slope into the glass - this will be normal drinking water, all the salt will remain in the basin. The beauty of this experience is that the child can do it on their own.
11 years. Litmus cabbage
What you need: red cabbage, filter paper, vinegar, lemon, soda, coca-cola, ammonia etc.
Your child has not yet begun to study chemistry in school, but in this experience he will have the opportunity to get to know real chemical terms... Any parent remembers from a chemistry course such a thing as a litmus test, and will be able to explain to a child that this is an indicator - a substance that reacts differently to the level of acidity in other substances. After that, the child can easily make such indicator papers at home and, of course, test them by checking the acidity in different household liquids.
The easiest way to make an indicator is from regular red cabbage. To do this, you need to grate the cabbage and squeeze out the juice, and then saturate it with filter paper (you can buy it at a pharmacy or in a wine store). The cabbage indicator is ready. Now cut the pieces of paper into smaller pieces and place them in different liquids that you can find at home. It only remains to remember which color corresponds to which level of acidity. So, 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 the level of acidity is in a chicken egg.
Anastasia Makarova, journalist, author of children's fairy tales and poems. Founder and Leader
Who loved at school laboratory works in chemistry? It is interesting, after all, it was to mix something with something and get a new substance. True, it did not always work out the way it was described in the textbook, but no one suffered about this, did they? The main thing is that something should happen, and we saw it right in front of us.
If in real life you are not a chemist and do not face much more difficult experiences every day at work, then these experiments, which can be carried out at home, will definitely amuse you, at least.
Lava lamp
For experience you need:
- Transparent bottle or vase
- Water
- Sunflower oil
- Food coloring
- Several effervescent tablets "Suprastin"
We mix water with food coloring, fill in sunflower oil... You do not need to stir, and you will not succeed. When a clear line between water and oil is visible, throw a couple of Suprastin tablets into the container. We look at the lava flows.
Since the density of the oil is lower than the density of water, it remains on the surface, with an effervescent tablet creating bubbles that carry water to the surface.
Elephant toothpaste
For experience you need:
- Bottle
- Small cup
- Water
- Detergent for dishes or liquid soap
- Hydrogen peroxide
- Fast acting nutritional yeast
- Food coloring
We mix liquid soap, hydrogen peroxide and food coloring in a bottle. In a separate cup, dilute the yeast with water and pour the resulting mixture into a bottle. We look at the eruption.
Yeast releases oxygen, which reacts with hydrogen and is pushed out. The soap suds create a dense mass erupting from the bottle.
Hot Ice
For experience you need:
- Tank for heating
- Transparent glass beaker
- Plate
- 200 g of baking soda
- 200 ml of acetic acid or 150 ml of its concentrate
- Crystallized salt
We mix acetic acid and soda in a saucepan, wait for the mixture to stop fizzling. Turn on the stove and evaporate excess moisture until an oily film appears on the surface. Pour the resulting solution into a clean container and cool to room temperature. Then we add a soda crystal and watch how the water “freezes” and the container becomes hot.
Heated and mixed vinegar and baking soda form sodium acetate, which, when melted, becomes an aqueous solution of sodium acetate. When salt is added to it, it begins to crystallize and generate heat.
Rainbow in milk
For experience you need:
- Milk
- Plate
- Liquid food coloring in several colors
- Cotton swab
- Detergent
Pour milk into a plate, drip with dyes in several places. We moisten a cotton swab in a detergent, put it in a bowl of milk. We look at the rainbow.
The liquid part contains a suspension of fat droplets that come into contact with detergent split and rush from the introduced stick in all directions. A regular circle is formed due to surface tension.
Smoke without fire
For experience you need:
- Hydroperite
- Analgin
- Mortar and pestle (can be replaced with ceramic cup and spoon)
The experiment is best done in a well ventilated area.
We grind hydroperite tablets to powder, do the same with analgin. We mix the resulting powders, wait a bit, see what happens.
During the reaction, hydrogen sulfide, water and oxygen are formed. This leads to partial hydrolysis with the elimination of methylamine, which interacts with hydrogen sulfide, the suspension of its small crystals of which resembles smoke.
Pharaoh snake
For experience you need:
- Calcium gluconate
- Dry fuel
- matches or lighter
We put several tablets of calcium gluconate on dry fuel, set on fire. We look at the snakes.
Calcium gluconate decomposes when heated, which leads to an increase in the volume of the mixture.
Non-newtonian fluid
For experience you need:
- Mixing bowl
- 200 g corn starch
- 400 ml of water
Gradually add water to the starch and stir. Try to make the mixture smooth. Now try to roll a ball out of the resulting mass and hold it.
The so-called non-Newtonian fluid in fast interaction behaves like solid, and when it is slow, it is like a liquid.