Guys, we put our soul into the site. Thanks for that
for discovering this beauty. Thanks for the inspiration and goosebumps.
Join us at Facebook And In contact with
We have a lot of things in our kitchen with which you can make interesting experiments for children. Well, for myself, to be honest, to make a couple of discoveries from the category of “how I didn’t notice this before.”
website chose 9 experiments that will delight children and raise many new questions in them.
1. Lava lamp
Need: Salt, water, a glass of vegetable oil, a few food colors, a large transparent glass or glass jar.
An experience: 2/3 fill a glass with water, pour into water vegetable oil. The oil will float on the surface. Add food coloring to water and oil. Then slowly add 1 teaspoon of salt.
Explanation: Oil is lighter than water, so it floats on the surface, but salt is heavier than oil, so when you add salt to a glass, the oil and salt begin to sink to the bottom. As the salt breaks down, it releases oil particles and they rise to the surface. Food coloring will help make the experience more visual and spectacular.
2. Personal rainbow
Need: A container filled with water (bath, basin), flashlight, mirror, sheet of white paper.
An experience: Pour water into the container and put a mirror on the bottom. We direct the light of a flashlight to the mirror. The reflected light must be caught on paper, on which a rainbow should appear.
Explanation: The beam of light consists of several colors; when it passes through the water, it decomposes into its component parts - in the form of a rainbow.
3. Volcano
Need: Tray, sand, plastic bottle, food coloring, soda, vinegar.
An experience: A small volcano should be molded around a small plastic bottle made of clay or sand - for entourage. To cause an eruption, you should pour two tablespoons of soda into the bottle, pour in a quarter cup of warm water, add a little food coloring, and finally pour in a quarter cup of vinegar.
Explanation: When baking soda and vinegar come into contact, a violent reaction begins with the release of water, salt and carbon dioxide. Gas bubbles and push the contents out.
4. Grow crystals
Need: Salt, water, wire.
An experience: To get crystals, you need to prepare a supersaturated salt solution - one in which when a new portion is added, the salt does not dissolve. In this case, you need to keep the solution warm. To make the process go better, it is desirable that the water be distilled. When the solution is ready, it must be poured into a new container to get rid of the debris that is always in the salt. Further, a wire with a small loop at the end can be lowered into the solution. Put the jar in a warm place so that the liquid cools more slowly. After a few days, beautiful salt crystals will grow on the wire. If you get the hang of it, you can grow fairly large crystals or patterned crafts on twisted wire.
Explanation: As the water cools, the solubility of the salt decreases, and it begins to precipitate and settle on the walls of the vessel and on your wire.
5. Dancing coin
Need: A bottle, a coin that can be used to cover the neck of a bottle, water.
An experience: An empty unclosed bottle should be put in the freezer for a few minutes. Moisten a coin with water and cover the bottle taken out of the freezer with it. After a few seconds, the coin will begin to bounce and, hitting the neck of the bottle, make sounds similar to clicks.
Explanation: The coin is lifted by air, which has compressed in the freezer and occupied a smaller volume, and now has heated up and begun to expand.
6. Colored milk
Need: Whole milk, food coloring, liquid detergent, cotton buds, plate.
An experience: Pour milk into a plate, add a few drops of dyes. Then you need to take a cotton swab, dip it in detergent and touch the wand to the very center of the plate with milk. The milk will move and the colors will mix.
Explanation: Detergent reacts with fat molecules in milk and sets them in motion. That is why skimmed milk is not suitable for the experiment.
7. Fireproof bill
Need: Ten-rouble note, tongs, matches or lighter, salt, 50% alcohol solution (1/2 part alcohol to 1/2 part water).
An experience: Add a pinch of salt to the alcohol solution, immerse the bill in the solution so that it is completely saturated. Remove the bill from the solution with tongs and allow excess liquid to drain. Set fire to a bill and watch it burn without burning.
Explanation: As a result of the combustion of ethyl alcohol, water, carbon dioxide and heat (energy) are formed. When you set fire to a bill, alcohol burns. The temperature at which it burns is not enough to evaporate the water that the paper bill is soaked in. As a result, all the alcohol burns out, the flame goes out, and the slightly damp ten remains intact.
Rasima Yuzbasheva
Synopsis of cognitive research activities in preparatory group"Egg in Salt Water"
Summary of cognitive research activities in the preparatory group
on the topic: « Egg in salt water» .
Our motto: Do not be sad!
Go through everything and find out everything!
Goals:
To expand and promote the accumulation of knowledge in children about some properties of water;
Explain what salt is and how it is mined;
Watch videos about salt.
Introduce children to the types of salt.
Discuss the benefits and harms of salt.
Discuss concepts such as salty water , density, volume, mass;
Develop curiosity and the desire to experiment, the ability to draw conclusions;
Continue to teach children to conduct experiments on their own;
Build respect for environment to natural resources.
Continue to develop composure, attentiveness and the ability to bring the work begun to the end.
Learning proverbs and sayings about salt.
Enrich vocabulary, activate vocabulary in children.
Equipment:
demo:
toy chicken, bags with different types of salt, musical accompaniment "Sounds of nature. Noise of water" "Recording of a clucking chicken", videos about salt mining.
dispenser: jars of water, salt shakers with salt, spoons, napkins, eggs, cucumbers.
Technology Key words: game moment of interest, experiment, conversation, dialogue with children, listening to music, watching video, physical culture pause, outdoor game.
preliminary work: Examination of illustrations depicting winter, ice, sea, reading and inventing riddles about all the states of water in nature, observing while walking, experimenting with freezing and coloring water. Learning proverbs and sayings about water.
Lesson progress:
The teacher and the children are going to group.
caregiver: Hello guys, tell me, do you like to travel? (Yes)
caregiver: Then today we will go on a journey to the magical World of Science. But, I want to warn you that in any journey it is very important to be attentive, friendly and able to come to the aid of each other, that is, team spirit is important, do you agree with me? (Yes).
caregiver: Then let's say our motto.
Everyone stands in a circle and puts their hands on each other's hands and says motto:
Our motto: Do not be sad!
Go through everything and find out everything!
Well done guys, let's hit the road!
The journey starts from the end groups, teacher with children move to the center groups, but on the way they hear the sound of water and stop.
caregiver: Guys, what is that sound?
Children: It's pouring water.
caregiver: What do we already know about water? What it is? What is the form of water?
Children's answers: Water is a liquid that has no color, no smell, no taste. It happens in the form of steam, solid in the form of ice and liquid in the form of a drop, in the sea, river, lake, in a tap, etc.
caregiver Q: Do you think we should conserve water? (Yes) And why? (Without water, all life on earth will perish.)
caregiver: And who knows how long a person can live without water? (6 - 7 days.)
Well done, you are right, there is nothing more precious in the world than wonderful and at the same time the most ordinary water. Preserving water means protecting life and health, the beauty and richness of the surrounding nature.
Let's continue our journey.
The teacher with the children reaches the middle groups. There are bags on the table.
caregiver: What do you think is in these bags? (Children don't know)
caregiver: Let me give you a riddle, and you try guess:
*IN water was born
Baptized in fire
Fell into the water and disappeared
(Answer : salt)
*They don't eat me alone
And without me they eat little
(Answer : salt)
IN water be born
afraid of water (salt)
caregiver: Well, now let's check if you guessed correctly. The teacher opens the bags, inside different types salt.
caregiver: Guys, you correctly solved the riddles, well done, there is salt in our bags. Now let's sit on the carpet and watch a video about salt. (watch a video about the different ways of extracting salt and the properties of salt)
caregiver: Did you like the video? (Yes)- Then let's see what you remember.
Questions:
What is salt? (Mineral substance that people can immediately eat)
Do you know what salt is? (stone (unpeeled, cooked, sea.)
Where does salt come from? (sea salt is obtained from the sea by evaporating water in the sun, and table salt is mined either in mines or in salt lakes.)
Well done guys, but you know that in ancient times people mined salt by burning some plants in a fire, and used the ash as a seasoning. Salt was more expensive than gold, it was used to pay for goods instead of money. There have even been wars over salt. Therefore, people have put together a lot of proverbs and sayings about salt. Let's get to know them:
Without will, there is no strength; without salt, there is no taste.
Trading without money is like eating without salt.
Without salt it is not tasty, but without bread it is not satisfying.
No salt, no bread - half a meal.
There are no lies in proverbs, in rain there is no salt in the water.
caregiver: Guys, do you remember the name of the profession of the one who extracts salt in the mines? (Miners)
And what do they take with them underground? (Helmet, flashlight, self-rescuer, you can breathe with it for 2 hours underground if there is a blockage). That's right, guys, as you can see, safety is important in any business. By the way, being a salt miner is not only honorable, but also good for health, because miners breathe salt and this helps to improve lung ventilation, normalizes all processes in the body, strengthens the body)
Guys, we have already found out that it is very useful to breathe salt and we know that salt is used for food, salt is also used in medicine, but how else is salt used? ( canned food, sprinkle the roads so that it is not slippery).
What is the name of the most salty Is there a lake in the world and where is it located? (Lake Baskunchak, located in Russia, in the Astrakhan region, it is much red sea salt)
And with the help of what, they extract salt from Baskunchak? (With help salt mining combine, which looks like a double-decker car, it sucks in salt mixed with water, then in a special chamber the salt is separated from the water and crushed inside the combine, etc.)
caregiver: Guys, are you interested? (Yes) Would you like to explore the properties of salt yourself? (Yes) Okay, but first I suggest you warm up a little.
Fizkultminutka.
“The first drop fell and the second ran, (fingers take turns hitting the palm).
We looked at the sky, droplets drip-drip sang,
(head turns in different directions).
Wet faces (next to the face of the movement of the palms).
We wipe them
Shoes look wet steel (putting foot on heel).
Let's move our shoulders together, and shake off all the droplets (circular movements of the shoulders).
We will run away from the rain, we will sit under a bush (take a couple of steps and squat)
Well done guys, now come closer and look at different types of salt, how do they differ? What is the color, smell, taste of salt? (Sea salt coarse, table salt; salt salty; white; without smell.)
caregiver: Well done. (Chicken clucking) Guys, look to the right, who is hiding there? (Hen) Let's get closer to her, see what she's guarding.
The teacher with the children approach the hen, eggs lie next to and under it.
caregiver: guys, everything that we have met on our way today is not without reason, we are traveling around the World of Science, and it is customary in science to conduct experiments and experiments, so we will now conduct interesting experiments, and everything that we have met today , we will need it for them. And now I invite you to our magical laboratory to conduct experiments.
Sit down guys, for starters, I suggest you conduct your own experience, each of you has a glass of water and a salt shaker in front of you, let's see what happens if you mix salt with water, take a spoonful of salt, add it to water and stir. What happened? (salt dissolved). What happened to the color of the water? (he hasn't changed). And with taste? (water has become salty) .
And now I want to spend with you interesting experience you know what will happen to egg if dropped into salt water? What if it's fresh? (Not)
Now we will find out, come closer to me, you will all help me.
There are 3 cans in front of you, 2 with plain water and one empty. Let's put it in the first jar of plain water egg, look guys, it immediately went to the bottom.
Now let's add salt to the second jar so that the water becomes salty who wants to help me with this? (a child is called and adds salt to the jar and mixes it). Another child drops egg in a jar of salt water. caregiver: Look guys, what happened? (egg immediately popped up.)
And now let's pour water from both cans into an empty jar, who wants to do this? (two children are called and take turns pouring water). Thanks guys, what happened now? (egg floats right in the middle.)
caregiver: Guys, what conclusions can we draw from our experience?
Children's answers: An egg sinks in clear water, and in salty pops up.
caregiver: Well done, this is due to the fact that any objects sink or float, depending on the density of the substance of which they are composed.
Density - allows you to compare two substances that occupy the same volume, will differ in mass.
An egg floats in salt water, because the density of the egg is lower than the density salt water.
By the way, you can experience the properties of density on yourself if you swim in the sea, swim in salty sea water is easier than in a fresh water pool, river or lake.
Guys, did you enjoy the experience? (Yes) Then you can do the same experience at home with your parents.
But that's not all, I want to offer you another useful experiment. Everyone come to your tables. The teacher gives each child a saucer with two pieces of cucumber.
Guys, I suggest that you salt one piece of cucumber a little bit, and do not salt the second at all. Now let's try them. What can we conclude from this experiment? (Salt makes the dish tastier). That's right, guys, but what do you think, if you salt the cucumber very much, then it will be delicious? (Not). That's right, in large quantities, salt is not only not tasty, but also harmful. It retains fluid in the body, and this interferes with the work of our heart and kidneys. Headaches may begin. Salt accumulates in the bones and because of this, the legs begin to hurt.
This was the last experiment for today, did you like it? (Yes) Before leaving the hospitable world of science, I suggest you play an outdoor game.
A game "Without salt - salt":
For this game, two drivers are selected, who sit on the ground opposite each other, so that the soles of their feet are in contact with each other. Drivers are blindfolded with a thick cloth bandage. The hands of the leaders are behind their backs. All the rest are players in the field. The field players, coming up alternately from one side to the drivers, shout "Without salt" and freely jump over their feet. On the way back you need to shout "Salt" and try again to jump over the legs of the drivers. The only difference is that the drivers try to catch the jumpers with their hands. If they succeed, then the driver changes. The one who was caught sits in the place of the one who caught him, and his eyes are already blindfolded.
Did you like the game? (Yes)
So our journey has ended, I want to tell you that today you behaved like real scientists, showed endurance, attention, ingenuity, intelligence and curiosity and deserved the title "young experimenter" and their awards. (the teacher awards the children with medals)
And get to know with them peace and miracles 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
Egg with salt
The egg will sink to the bottom if you put it in a glass of plain water, but what happens if you add salt? The result is very interesting and can visually show interesting density facts.
You will need:
- Salt
- Tumbler.
Instruction:
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 observe what is happening.
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 water 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 bottled?
You will need:
- A bottle with a neck diameter smaller than the diameter of the egg
- Hard boiled egg
- Matches
- some paper
- Vegetable oil.
Instruction:
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. Put an egg on the neck.
When the fire goes out, the egg will be inside the bottle.
Explanation
The fire provokes the heating of the air in the bottle, which comes out. After the fire goes out, the air in the bottle will begin to cool and contract. Therefore, a low pressure is formed in the bottle, and the external pressure pushes the egg into the bottle.
The balloon experiment
This experiment shows how rubber and orange peel interact with each other.
You will need:
- Balloon
- Orange.
Instruction:
1. Blow up the balloon.
2. Peel the orange, but don't throw away the orange peel.
3. Squeeze the orange peel over the balloon, after which it will burst.
Explanation.
Orange peel contains limonene. It is able to dissolve rubber, which is what happens to the ball.
candle experiment
An interesting experiment showing burning a candle in the distance.
You will need:
- regular candle
- Matches or lighter.
Instruction:
1. Light a candle.
2. Extinguish it 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 from an extinguished candle contains paraffin, which quickly ignites. The burning vapors of paraffin reach the wick, and the candle begins to burn again.
Vinegar Soda
A balloon that inflates itself is a very interesting sight.
You will need:
- Bottle
- A glass of vinegar
- 4 teaspoons of soda
- Balloon.
Instruction:
1. Pour a glass of vinegar into the bottle.
2. Pour the soda into the bowl.
3. We put the ball on the neck of the bottle.
4. Slowly put the ball vertically, while pouring soda into a bottle of vinegar.
5. Watching the balloon inflate.
Explanation
When baking soda is added 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 a lemon
- A spoon
- A bowl
- Cotton swab
- White paper
- Lamp.
Instruction:
1. Squeeze some lemon juice into a bowl and add the same amount of water.
2. Dip a cotton swab into the mixture and write something on the white paper.
3. Wait for the juice to dry and become completely invisible.
4. When you're ready to read the 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 hard to see on paper, and no one will know there's lemon juice in it until it's warmed up.
Other substances which work in the same way:
- Orange juice
- Milk
- onion juice
- Vinegar
- Wine.
How to make lava
You will need:
- Sunflower oil
- Juice or food coloring
- Transparent vessel (can be a glass)
- Any effervescent tablets.
Instruction:
1. First, pour the juice into a glass so that it fills about 70% of the volume of the container.
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 dissolves, you can throw another one.
Explanation
The oil separates from the water because it has a lower density. Dissolving in the juice, the tablet releases carbon dioxide, which captures parts of the juice and lifts it up. The gas is completely out of the glass when it reaches the top, and the juice particles fall back down.
The tablet hisses due to the fact that 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 it really so?
You will need:
- Cup
- Ice cubes.
Instruction:
1. Fill the glass with warm water up to the rim.
2. Lower the ice cubes carefully.
3. Watch 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 can burst in winter). Water from melted ice takes up less space than the ice itself. So when the ice cube melts, the water level stays about the same.
How to make a parachute
find out about air resistance making a small parachute.
You will need:
- Plastic bag or other lightweight material
- Scissors
- A small load (perhaps some figurine).
Instruction:
1. Cut out a large square from a plastic bag.
2. Now we cut the edges so that we get an octagon (eight identical sides).
3. Now we tie 8 pieces of thread to each corner.
4. Don't forget to make a small hole in the middle of the parachute.
5. Tie the other ends of the threads to a small load.
6. Use a chair or find a high point to launch the parachute and check how it flies. Remember that the parachute should fly as slowly as possible.
Explanation
When the parachute is released, the load pulls it down, but with the help of the lines, the parachute occupies a large area that resists the air, due to which the load slowly lowers. The larger the surface area 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 flow through it slowly, rather than flopping 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 items used in the experiment are easy to find in everyday life. Made homemade mini tornado much safer than the tornado that is shown on television in the steppes of America.
We all want our children to grow up to be curious and active people. A developed imagination, a desire to learn, a craving for something new are indispensable qualities successful person. How to expand the horizons of the baby, push him to comprehend the world?
Monotonous, monotonous classes will not help here. They are simply uninteresting to the child, and therefore ineffective. But the admiring attention of the little fidget is guaranteed if, instead of a boring theory, you conduct experiments with children and offer him a series of exciting experiments with substances familiar to him from early childhood.
Here is an example of salt. Well, what's interesting about it? It turns out that this sorceress works real miracles.
Experience with egg and salt water or in other words "Sea and Lake"
The experience can be called "Sea and Lake". We will need three glass jars, a boiled egg, salt and a spoon.
In the first bank we will have fresh water - this is a lake. In the second jar we dissolve 4 tablespoons of salt - this is the sea. Now we take the egg and lower it into a jar of fresh water. So far, nothing surprising: the egg is sinking.
We transfer it to a jar of salt water. And here a miracle happens - the egg floats and stays on the surface. We are trying to drown him by pressing with a spoon. Efforts are useless, it still rises. Why? We explain to the child that salt water is heavier than fresh water, and therefore pushes lighter objects up. The more salt in the water, the denser it is, the more difficult it is to drown in it.
Now pour into the third jar of salt water, lower the egg into it. Little by little we add fresh water there. The egg slowly descends, hovering at different levels. Finally sinks to the bottom like a submarine. Now add salt water to the jar. Our boat gradually floats up and again appears on the surface.
Such experiments with children will be interesting not only for preschoolers, but also for younger students. It is easy to repeat it in the company of friends, without revealing the secret at first - after all, salt water looks indistinguishable from fresh water.
People who at least sometimes go into the kitchen to not only eat, but also cook something, notice useful little things over time. For example, that eggs do not float during cooking, but lie on the bottom. Therefore, the vague suspicions that arise when a raw egg floats in the water, not unfounded.
What is there inside?
The difficulties of determining the freshness of such a product when buying are obvious. Especially in supermarkets, where eggs are often sold in closed, opaque packaging. But everything becomes clear when we bring them home and start cooking. If at the same time you have to break them, then the following signs should alert you:
- The smell of hydrogen sulfide.
- Opaque white.
- When broken into a pan or bowl, the yolk immediately spreads.
But how do you test the freshness of an egg without breaking it? Just immerse in water. If the egg floats in the water, it is spoiled or stale.
Why does a spoiled egg float?
Contrary to popular belief, an egg is not hermetic at all. The shell has pores so that the chick can breathe. But in addition to oxygen, microorganisms also penetrate through them. As a result of the vital activity of some of them, putrefactive processes develop and gases are released. If an egg floats in water, it means that a lot of gases have accumulated in it, which are lighter than water.
By the way, even if there are no harmful microorganisms inside that cause rotting and an unpleasant smell, the old egg will still float up. Air gradually accumulates between the protein and shell membranes on the blunt side. For the same reason, a stale egg is very light.
By the way, this is why it is recommended to store eggs with the blunt end up so that the yolk does not come into contact with the air chamber. And it is better not to put them in a compartment in the refrigerator door, as its frequent opening leads to the fact that they deteriorate faster.
If the egg does not fully float
When, when immersed in water, the egg immediately goes to the bottom and takes a horizontal position, then we have a very fresh product. But over time, the chemical processes occurring inside change the consistency of the protein and yolk, making them more liquid. Therefore, if the egg floats in the water with a blunt end up, then it is about a week old. So, you can still eat it. If it takes a vertical position, then it is about 2-3 weeks old. An egg that is more than a month old floats completely and cannot be eaten.
deceptive salt
Knowledgeable people add a little salt when boiling eggs so that accidentally broken eggs do not leak out. Therefore, it should be noted that if you first added salt to the water, then the correct definition of freshness will be in question. The fact is that salt increases. If an egg floats in water that has previously been salted, this does not necessarily mean that it is stale. But if it lies horizontally even in salt water, then there can be no fresh product.
How to determine the quality of eggs in the store
So that it does not happen that all three dozen eggs bought suddenly surface, you should try to determine their freshness when buying.
- Look It must be borne in mind that the class of the product must be indicated on the packaging. There are diet eggs that are stored for no more than 8 days, and there are canteen eggs (blue print), which we most often buy. Their maximum shelf life is a month. There is also a class of long-term ones. They can be kept in the refrigerator for about six months, but these are rarely found in stores.
- Examine the surface. The shell should be matte and slightly rough. It is smooth and shiny only in stale eggs.
- Weigh the egg in your hand. If it is old, it will be very light in weight.
- Shake the egg. When it is fresh, the yolk does not move inside. This means that you will not feel that something is hanging in the shell, and you will not hear any sounds when shaking.
Well, now we have figured out what's what, and realized that if the egg floats completely in the water, then it is stale, or even rotten. However, a boiled egg may float up, mistakenly placed next to raw ones, but such confusion rarely occurs. Therefore, it is better not to save on health and throw away a stale product.
Loading...