Why does an egg float in salt water? Presentation "The Little Secret of Salt in Water"

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 version of the previous experience with eggshells and vinegar, proving the need for regular brushing. The difference in the experiment is that before immersing in the 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.

Rasima Yuzbasheva
Summary of cognitive research activities in the preparatory group "Egg in salt water"

Summary of cognitive research activities in the preparatory group

on the topic of: « 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;

Strengthen respect for the environment and 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:

*V 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)

V water be born

afraid of water (salt)

caregiver: Well, now let's check if you guessed correctly. The teacher opens the bags, inside are different types of 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 conduct an interesting experiment with you, 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 tasty? (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.

The 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)

This is one of the easiest and most visual experiments that you can do at home. All we need is a raw egg, a glass and some salt. For clarity, we took two glasses and two raw eggs.

Let's start our experience. Pour into one of the glasses of plain tap water. Drop the egg into the glass. What happened? The egg sank and sank to the bottom of the glass. In the photo below, due to the curvature of the glass, the egg is amusingly distorted.

Pour into a second glass of warm water. Add 6 tablespoons of salt to this glass. And stir the salt very well so that it completely dissolves in the water.

Now the most interesting. Gently dip the second egg into the glass in which you just dissolved the salt. The egg floats on the surface!

Explanation of experience

The average density of an egg is much higher than the density of tap water. When we dissolve salt in water, its density increases, and the egg no longer sinks in it. Thus, a simple conclusion can be drawn: objects sink in a liquid if their density is higher than the density of the liquid.

We can observe a similar effect at sea. Sea water is very salty and has a high density. She seems to be pushing us out of the water. Staying afloat in such water is much easier than swimming in fresh water, of course, if sea waves do not interfere.

Density and weight

I will try to explain “on the fingers” what density is. Density can be defined as the amount of matter contained in a given space or volume. If the amount of substance (amount of matter) in a given space or volume is greater, then the object is considered denser and heavier at the same time. But density and weight are not the same thing, they are not interchangeable concepts.

Weight is determined by the effect of gravity on an object. Unlike density, weight depends on the amount of attraction at a particular location. For example, consider an ordinary egg. Its density remains the same no matter where it is. Even if you put it in space under zero gravity, its density will not change. But an egg in space will lose its weight!

Why does an egg sink or float?

As already mentioned, if you lower an object that is denser than fresh water, then the object sinks. This is exactly what happened when we lowered the egg into fresh tap water - the egg is denser, it repels water particles and makes room for itself, sinking to the bottom. But when we put an egg in salt water, salt water is heavier than fresh water, it has more ability to keep the egg afloat.

Why salt makes water denser

But why does salt, when dissolved in water, make the water denser? When salt dissolves in water, it breaks down into ions, which are then attracted to water molecules. Due to this attraction, the amount of matter per unit volume increases - density. Water now consists not only of hydrogen and oxygen molecules, sodium and chlorine have joined them (since salt consists of sodium and chlorine). Thus, there are more particles in salt water compared to fresh water.

And get to know with them world and wonders of 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.

Hello dear friends! You've probably noticed that when you put your eggs in cold, unsalted water, some will float. Many thought about how to check them for freshness without tasting them. It doesn't always smell bad. Most often, you realize that it is rotten, only by preparing it. How to determine the freshness of a product? If an egg floats in cold water, what does it mean? I will tell you about this today.

For testing we need:

• Deep saucer, preferably transparent.
• Cold water.
• Eggs.

This method makes it easy to determine whether eggs can be eaten or better thrown away. Our grandmothers also used it.

1. We put the bowl on a flat countertop, fill it with water, almost to the brim.
2. Place the egg carefully in the water so as not to break it on the bottom. It either sinks or floats.

   

3. Those that floated to the top should be thrown away. They have deteriorated. If a raw egg floats in water, it is not fresh. This rule applies only to pure water. Everything floats in salt water, due to the increase in the density of water. For the same reason, protein does not come out of a cracked shell during cooking. Salty liquid squeezes him.

   

4. Drowned testicles, but standing upside down, indicate the end of the shelf life. You can still eat them, they will not bring harm. From the expiration date on the box, you can eat them for another three weeks. But be sure to test this method for freshness.

   

5. Those that drowned and lie on their side at the bottom are the freshest. They can be eaten right away or stored in the refrigerator. The optimum temperature for storing the product is +4 degrees.

   

With eggs, water and salt, children's experiments are carried out to explain to the child the physical properties of water. This knowledge is applied, as you noticed, to determine the freshness of the product. https://www.youtube.com/watch?v=2uEH23Vn6_U

Why do raw eggs float?

Under the shell there is an under-shell film, moisture and air pass through it, but protein does not pass through. At the blunt end of the egg oval, the shell peels off to form an air sac. Over time, some moisture and carbon dioxide evaporate from the product, so the contents are compressed and some of the air under the shell increases. The longer the egg lies, the more air accumulates in it.

This transformation causes non-fresh eggs to float.

An unpleasant odor is formed when the protein decomposes. Under the action of microorganisms, hydrogen sulfide gas is released. It gives off a rotten egg smell. Eating rotten eggs can lead to nausea, vomiting, and diarrhea. Signs of poisoning will appear in the period from 6 to 72 hours after eating them.

Why do boiled eggs float on the surface

All boiled eggs lie at the bottom of the bowl and only one floats for some reason. What is the reason? I think many of you have experienced the phenomenon of hard-boiled popping in cold water. There is no mystery here. As mentioned above, the longer it is stored, the more air is formed in it. When cooked, this air does not go anywhere, but is collected in one place under the shell. Most often from his blunt side. You can break up and make sure the air bag in the swimmer is bigger than the rest. This indicates not the first freshness of the product. It was stored for a long time and the protein began to evaporate.

Quail eggs

Quail eggs are much healthier than chicken eggs, although they are much smaller in size. You can buy them in supermarkets, but will they be fresh? How to check it now I will tell. To check the freshness of such a product, you need to break it into a plate. Fresh protein is thick, if it is liquid, watery, then the egg is bad. The yolk of a hard-boiled egg is bright yellow when cut. If it is pale yellow, then it has already lost its nutritional qualities. The weight of a good quail egg is from 10 to 12 grams. If the testicle seemed very light to you, it means that it has already begun to dry out.

Unlike a chicken egg, a quail egg does not go rotten due to the content of lysozyme, an antibacterial substance, in it. Therefore, when the expiration date has expired, it tends to dry out. The shell of a real high-quality testicle should be camouflage. If it is white or soft, then such a product is not of high quality. You can also tell about freshness by the location of the yolk. Smashed it on a plate.

The yolk should be almost in the middle of the protein, if it is closer to the edge, then the egg is not the first freshness. Friends, I think you have learned useful and interesting facts for yourself and put them into practice. On that I say goodbye to you until we meet again on the pages of our blog. Subscribe to news, put classes, share information with friends on social networks. Goodbye.