Egg in fresh water. Interesting experiments with an egg that can captivate preschoolers at home. Egg with salt
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.
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.
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.
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 a quarter cup warm water, add a little food coloring, and at the end 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.
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 warm place so that the liquid cools down 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.
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 began to expand.
6. Colored milk
Need: Whole milk, food coloring, liquid detergent, cotton buds, plate.
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).
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 insufficient to evaporate the water it is saturated with. paper bill. As a result, all the alcohol burns out, the flame goes out, and the slightly damp ten remains intact.
Anyone who has swum in the sea knows that salt water holds the body better than fresh water. Swimming is easy. So let's time our home experience to the dreams of a future trip to the sea. This experience for children is designed to visually convince the baby that sea water will be his good assistant in swimming. For the experiment, we need a raw egg, two empty liter jars, table salt. Good luck!
Experience for children: why does an egg not sink?
1. We take two cans, into each of which we pour cold water from the tap (about 2/3). Throw 3 tablespoons of salt into one of the jars. Stir until completely dissolved, so that there is the appearance of "the same" water in two jars.
Drawing by Irina Dedusheva
2. Gently place the egg in a jar of fresh water. It will go down.
Drawing by Irina Dedusheva
3. We take out the egg and put it in a jar of salt water. It will sink a little into the water, but will immediately pop up. You can “force” the egg (say, with a spoon) to lightly press it to the bottom. But it will still rise to the surface.
Drawing by Irina Dedusheva
4. Add some fresh water to salt water - start with 2-3 tablespoons. The egg will sink a little into the water column and, as it were, hang between the bottom and the surface.
Drawing by Irina Dedusheva
Explanation of the experiment for the child
Salt water is heavier and therefore more dense than fresh water. Therefore, it pushes lighter objects up. It is the salt that brings the egg to the surface. The more salt in the water, the denser it is, the more difficult it is to drown in it.
And if you add fresh salt water to the existing salt water, then the egg will gradually sink, because the density of the water will decrease. The more fresh water, the more obvious the "drown" egg. Not enough salt to push it out.
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 lexicon, 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: Examining 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 trip 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, she paid for the 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,
(V different sides head turn).
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 met today on our way 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 spend your own experience, in front of each of you is a glass of water and a salt shaker, 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 conduct an interesting experiment with you, you know what will happen to egg if dropped into salt water? What if it's fresh? (No)
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? (No). 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)
The kitchen is a great place to experiment.
Chuda and I recently conducted two simple but nonetheless interesting experiments in physics.
We invite you to experiment with your children!
All that is needed for these experiments is -
- two raw eggs
- one boiled egg
- two cans of water
FIRST EXPERIENCE-
We take two eggs, one of them raw and the other boiled, and try to determine which is which without breaking them.
For us adults, this is not difficult, and every housewife will determine this with ease. But it will be very interesting for a child to twist and observe that they are spinning in completely different ways.
Everything is explained very simply! In a boiled egg, the center of gravity is constant, so it spins. And a raw egg has a liquid mass inside, and the center shifts all the time, being a brake, so a raw egg spins with difficulty.
SECOND EXPERIENCE -
We NEED - two raw eggs and two cans of water, a few tablespoons of salt.
Let's try to find out what What will happen to an egg if you put it in a jar of water?
First, put the egg in a jar of clean water - the egg sank to the bottom.
Add salt to the second jar, and release the egg into this jar - the egg remains floating on the surface of the water.
Again, the explanation is very simple. —
Salt increases the density of water! It's all about the density of the water. The higher it is, the more difficult it is to drown in it. That is why it is much easier to swim in the salty sea than in freshwater river. Salt water helps to stay on the surface. For example, in the Dead Sea, which has a very strong concentration of salt, a person can safely lie on the surface of the water without fear of drowning.
We participate with our experience in an exciting and educational
Participating in simple but spectacular egg experiments will delight children and show them that science can be fun and exciting. All these tricks are easy to do at home, and it will not require significant expenses.
Submarine
The salt water experiment will help children understand how you can change the properties of a liquid just by adding salt to it.
For experience you will need:
- raw eggs (fresh);
- 3 half-liter jars without stickers;
- salt.
Pour water into two jars and invite the child to dip an egg into each of them - they will immediately fall to the bottom. Then add a few large spoons of salt to one container and mix gently: the “experimental” will float to the surface. In an empty third jar, put another egg and alternately pour fresh and salt water into it so that it hangs in the middle.
shell dissolution
This experiment will show what happens if you put an egg in vinegar. To carry it out you will need:
- a raw egg;
- table vinegar;
- wide glass or jar.
Dip the egg in a glass of vinegar and watch it with your child for a few minutes. At first, as in the case of fresh water, it will sink, but the acidic solution will soon react with the calcium compound that makes up the shell. Bubbles of carbon dioxide will begin to form on its surface (the rate of their appearance depends on the concentration of vinegar). In this form, the glass must be left for several hours or even days, until the shell is completely dissolved. The resulting “ball”, covered with a thin film, will bounce off the table like rubber. It can be carefully crushed in your hands or shined with a flashlight - the yolk on the cords will be clearly visible.
The experiment is time consuming, so take a few eggs at once in case one breaks.
About the benefits of toothpaste
There is another option previous experience with eggshells and vinegar, proving the need to brush your teeth regularly. The difference in the experiment is that before immersing in an acid solution, one half of the experimental product must be generously smeared with any toothpaste. Only the shell on the raw half will dissolve.
Super Strength
This trick has a simple explanation in terms of physics, but for preschoolers it will be a real miracle. It will take a couple of dozen eggs, evenly laid in two factory forms. On top of every ten you need to put a plank (small cutting boards made of plastic or wood will do) and boldly stand on them with your feet - this design can withstand even an adult. For greater entertainment and acuity, you can do without planks.
Focus with a bottle
For the classic bottle experience, you will need the following kit:
- hard-boiled and peeled egg;
- matches;
- a small strip of paper;
- a bottle with a wide neck (an egg in a vertical position should close it without slipping inside).
Make sure with your child that the egg cannot be pushed into the vessel with the help of hands. Then set fire to the paper and throw it into the bottle. After that, you need to close the neck, inserting an egg into it with a sharp end, and wait what happens. Gradually, it will begin to be drawn into the bottle, taking an elongated shape right before our eyes, until it falls to the bottom. The reverse process will help to take it out: you need to turn the bottle over and heat its bottom from the outside.
Fire can be replaced with boiling water - just pour a little into the bottle and shake slightly to warm the bottom, then pour it out and continue the experiment.
Silver ball
Spectacular trick for children, which is able to decorate the program of the holiday. You will need:
- egg (raw or boiled);
- convenient tongs (for example, for spaghetti);
- a candle or other source of open fire;
- a glass of plain water.
In front of the audience, hold the egg over the fire with tongs until it is covered with a black coating (a few seconds will suffice). Let the children admire the result for a while, then dip the charred egg into the water. It will look like it was cast from pure silver! Of course, until you get it out of the water.
Spectacular fall
The trick with an egg falling into a glass is always a hit with the kids. For him, you need to prepare:
- a raw egg;
- a glass of water;
- a small piece of cardboard;
- toilet paper roll or other suitable ring.
Build a structure: put cardboard on a glass of water, put a sleeve on top (so that it is above the center of the glass), and place the main ingredient itself on top. With a light but sharp movement, knock the cardboard out from under the sleeve, these auxiliary parts of the building will scatter, and the egg will fall right into the glass.
As a bonus, teach the kids to tell if they have a raw or boiled egg. All that is needed for this is to try to spin it like a top. Raw will not make even a couple of revolutions, and cool will rotate very quickly.