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

Taking part in simple yet spectacular egg experiments will delight children and show them that science can be fun and exciting. All of the above tricks are easy to do at home, and it does not require significant costs.

Submarine

The salt water experiment will help children understand how a liquid can be altered by simply adding salt to it.

For experience you will need:

• raw eggs (fresh);
• 3 half-liter cans 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 tablespoons of salt to one container and mix gently: the "experimental" will float to the surface. Place another egg in an empty third jar and alternately pour fresh and salted water into it so that it hangs in the middle.

Dissolving the shell

This experiment will show you what happens when you put an egg in vinegar. To carry it out you will need:

• a raw egg;
• table vinegar;
• a wide glass or jar.

Place 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 dissolves completely. The resulting "ball" covered with a thin film will bounce off the table like rubber. It will be possible to gently wrinkle it in your hands or illuminate it with a flashlight - the yolk on the ropes will be clearly visible.

The experiment is time consuming, so grab several eggs at once in case any breaks.

The benefits of toothpaste

There is another variation on the previous experience with eggshells and vinegar, which proves the need to regularly brush your teeth. The difference in conducting the experiment is that before immersion in the acid solution, one half of the test product should be generously smeared with any toothpaste. Only the shells on the untreated 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, exactly laid in two factory forms. On top of every ten, you need to put a board (small cutting boards made of plastic or wood are suitable) and boldly stand on them with your feet - such a structure will withstand even an adult. For greater entertainment and acuity of sensations, you can do without boards.

Trick 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 an upright position should close it without slipping inside).

Make sure with your child that the egg cannot be pushed into the container with your hands. Then set fire to the paper and toss it into the bottle. After that, you need to close the neck by inserting an egg into it with a sharp end, and wait for what will happen. 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 remove it outside: you need to turn the bottle over and heat its bottom from the outside.

The 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

A spectacular trick for children that can decorate the holiday program. You will need:

• egg (raw or boiled);
• Comfortable 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 in pure silver! Until you get him out of the water, of course.

Spectacular fall

The trick with an egg falling into a glass is always a success with children. For him you need to prepare:

• a raw egg;
• a glass of water;
• a small piece of cardboard;
• toilet roll or other suitable ring.

Build a structure: put cardboard on a glass of water, put a sleeve on top (so that it is over the center of the glass), and place the main ingredient itself on the top of the head. 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 directly into the glass.

As a bonus, teach children to identify whether they have a raw or boiled egg. All you need to do is try to spin it like a top. Raw will not make even a couple of revolutions, but steep ones will spin very quickly.

Rasim Yuzbasheva
Abstract of cognitive and research activities in the preparatory group "Egg in salt water"

Abstract on cognitive and research activities in the preparatory group

on the topic of: « Salt water egg» .

Our motto: Do not be sad!

Go through everything and find out everything!

Goals:

Expand and promote the accumulation of knowledge among children about some of the properties of water;

Explain what salt is and how it is obtained;

View videos about salt.

To acquaint children with the types of salt.

Explain the benefits and dangers of salt.

Explain concepts such as salty water, density, volume, mass;

Develop curiosity and a desire to experiment, the ability to draw conclusions;

Continue teaching children to experiment on their own;

To consolidate respect for the environment and natural resources.

Continue to develop composure, attentiveness and the ability to bring the work started to the end.

Learning proverbs and sayings about salt.

Enrich vocabulary, activate vocabulary in children.

Equipment:

demonstration:

chicken toy, bags with different types of salt, musical accompaniment "Sounds of nature. The sound of water " "Chicken Cluck Recording", video materials about the extraction of salt.

handout: jars of water, salt shakers, spoons, napkins, eggs, cucumbers.

Technology: game interest moment, experiment, conversation, dialogue with children, listening to music, watching video, physical culture pause, outdoor game.

Preliminary work: Consideration of illustrations depicting winter, ice, sea, reading and inventing riddles about all states of water in nature, observing on walks, experimenting with freezing and painting water. Memorizing proverbs and sayings about water.

Course of the lesson:

The teacher with the children are going to group.

Educator: Hello guys, tell me, do you like to travel? (Yes)

Educator: 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 each other's aid, that is, the team spirit is important, do you agree with me? (Yes).

Educator: Then let's say our motto.

Everyone stands in a circle and puts their hands on each other's arms 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 begins at the end group, the teacher with the children move to the center group, but on the way they hear the sound of water and stop.

Educator: guys, what is this sound?

Children: It is pouring water.

Educator: And what do we already know about water? What it is? What is the form of water?

Children's answers: Water is a liquid that is colorless, odorless and tasteless. It is in the form of vapor, solid in the form of ice and liquid in the form of a drop, in the sea, river, lake, in a tap, etc.

Educator: Do you think you need to conserve water? (Yes) And why? (Without water, all life on earth will perish.)

Educator: 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 very ordinary water. Conserving water means protecting life and health, beauty and wealth of the surrounding nature.

Let's continue our journey.

The teacher with children reaches the middle group... There are closed bags on the table.

Educator: what do you think is in these bags? (Children don't know)

Educator: Let me give you a riddle, and you try guess:

*V water was born

Baptized in the fire

Fell into the water and disappeared

(Answer : salt)

* They don't eat me alone

And they don't eat much without me

(Answer : salt)

V water be born

Afraid of water (salt)

Educator: Well, let's now check if you guessed correctly. The teacher opens the bags, inside are different types of salt.

Educator: Guys, you've solved the riddles correctly, 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 different methods of salt extraction and the properties of salt)

Educator: Did you like the video? (Yes)- Then let's see what you remember.

Questions:

What is salt? (A mineral that humans can consume immediately)

Do you know what salt is? (stone (unrefined, cooked, seafood.)

Where does salt come from? (sea salt is obtained from the sea by evaporating water in the sun, and table salt is obtained either in mines or in salt lakes.)

Well done guys, and you know that in ancient times people mined salt by burning some plants in a fire, and used 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 added a lot of proverbs and sayings about salt. Let's let's get to know them:

Without will, there is no strength, without salt, there is no taste.

Trading without money is like drinking without salt.

It's not tasty without salt, and it's not satisfying without bread.

No salt, no bread - half lunch.

There are no lies in proverbs, in rain no salt in water.

Educator: Guys, do you remember the name of the profession of someone who extracts salt in 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, it's important to be safe in every business. By the way, being a salt miner is not only honorable, but also good for health, since 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 in food, salt is also used in medicine, but how else is salt used? ( Canned food, sprinkle the road 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? (Lake Baskunchak, located in Russia, in the Astrakhan region, it is much red sea salt)

And with the help of what, salt is extracted from Baskunchak? (With help salt harvester, which looks like a double-deck 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.)

Educator: Guys, are you interested? (Yes) Would you like to explore the properties of salt on your own? (Yes) Okay, but first I suggest you do a little exercise.

Physical education.

“The first drop fell and the second one ran, (fingers strike the palm in turn).

We looked at the sky, drops drip - drip sang,

(head turn in different directions).

Wet their faces (next to the face with palms movements).

We wipe them off

Look like wet steel shoes (putting the foot on the heel).

Let's move our shoulders together, and shake off all the droplets (circular movements with 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 the different types of salt, how are they different? What is the color, smell, taste of salt? (Coarse sea salt, fine table salt; salt salty; white; without smell.)

Educator: Well done. (Chicken clucking is heard) Guys, look to the right, who's hiding there? (Hen) Let's get closer to her, see what she is guarding.

The teacher with the children come up to the hen, eggs lie next to it and under it.

Educator: guys, everything that we met on our way today is not without reason, we are traveling around the World of Science, and in science it is customary to conduct experiments and experiments, so we will now conduct interesting experiments with you, and everything that we met today , it will come in handy for them. And now I invite you to our magic laboratory to conduct experiments.

Sit down guys, for starters I suggest you conduct your own experience, in front of each of you there 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 the water and stir. What happened? (salt dissolved)... What happened to the color of the water? (it hasn't changed)... And with taste? (water became salty) .

And now I want to have an interesting experience with you, you know what will happen with an egg if we put it in salt water? And if in fresh? (Not)

Now we will find out, come closer to me, you will all help me.

Here are 3 cans, 2 with plain water and one empty. Let's put it in the first can 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? (the child is called and adds salt to the jar and mixes it)... Another child lowers egg in a jar of salt water. Educator: See guys what happened? (egg immediately floated up.)

Now let's pour water from both cans into an empty jar, who wants to do that? (two children are called and take turns pouring water)... Thanks guys, what happened now? (egg floats exactly in the middle.)

Educator: Guys, what conclusions can we draw from our experience?

Children's answers: The egg drowns in clear water and in salty pops up.

Educator: 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, occupying the same volume, will differ in mass.

The 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 yourself if you swim in the sea, swim in salty sea water is lighter than in a pool, river or freshwater lake.

Did you guys like the experience? (Yes) Then you can do the same experience with your parents at home.

But that's not all, I want to offer you another useful experiment. Come all to your desks. The teacher distributes a saucer with two slices of cucumber to each child.

Guys, I suggest you add a little salt to one piece of cucumber, and not to salt the second at all. Now let's try them. What conclusion can we draw from this experiment? (Salt tastes better)... That's right guys, but what do you think, if you salt a cucumber very strongly, 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 builds up in the bones and causes pain in the legs.

This was the last experiment for today, did you like it? (Yes) Before leaving the hospitable world of science, I invite you to play an active game.

The game "No 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. The drivers are blindfolded with a thick cloth bandage. The drivers' hands are behind their backs. All the rest are players in the field. The field players, coming up alternately from one of the sides to the drivers, shout "Without salt" and jump over their legs without hindrance. On the way back it is necessary to shout "Salt" and try to jump over the legs of the drivers again. The only difference is that the drivers are trying to catch the jumpers with their hands. If they succeed, then the driver changes. The one who was caught sits down in the place of the one who caught him, and he is already blindfolded.

Did you like the game? (Yes)

So our journey ended, I want to tell you that today you behaved like real scientists, showed restraint, 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 simplest and most intuitive experiences you can do at home. We only need a raw egg, a glass and some salt. For clarity, we took two glasses and two raw eggs.

Let's start our experience. Pour regular tap water into one of the glasses. Dip the egg into the glass. What happened? The egg drowned and sank to the bottom of the glass. In the photo below, due to the curvature of the glass, the egg is curiously 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 comes the fun part. Gently dip the second egg into the glass you just dissolved the salt in. The egg is floating on the surface!

Explaining the experience

The average density of an egg is much higher than that 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 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. It seems to push us out of the water. Keeping afloat in such water is much easier than swimming in fresh water, of course, if the 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 a substance contained in a given space or volume. If the amount of matter (the amount of matter) in a given space or volume is greater, then it is considered that the object is 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 action of gravity on an object. Unlike density, weight depends on the amount of attraction at a particular location. Let's take a regular egg as an example. Its density remains the same no matter where it is. Even if you put it in space under zero gravity conditions, its density will not change. But the egg in space will lose its weight!

Why does the egg sink or float

As already mentioned, if you lower an object that is denser than fresh water, then the object sinks. This is 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 is composed of sodium and chlorine). Thus, salt water contains more particles than fresh water.

And together with them learn peace 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

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
• A 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 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 this really so?

You will need:

• Cup
• Ice cubes.

Instructions:

1. Fill the glass with warm water to the very rim.

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 can burst in winter). The water from the melted ice takes up 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. 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 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.

Hello dear friends! You've probably noticed that when you put eggs in cold, non-salty water, some will float. Many wondered how to test them for freshness without trying to taste. After all, an unpleasant smell is not always felt. More often than not, you only realize what is rotten by cooking it. How to determine the freshness of a product? If an egg floats in cold water, what does that mean? I will tell you about this today.

For testing we need:

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

This method makes it easy to determine if the eggs can be eaten or should be thrown away. Our grandmothers also used it.

1. We put the bowl on a flat tabletop, fill it with water, almost to the brim.
2. Place the egg carefully in the water to avoid breaking it on the bottom. It either sinks or floats.

   

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

   

4. Drowned testicles, but standing with their end up, indicate the end of the shelf life. You can still eat them, they will not bring harm. From the day the shelf life on the box expires, you can eat them for another three weeks. But be sure to test this way for freshness.

   

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

   

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

Why do raw eggs float?

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

This transformation causes non-fresh eggs to float.

An unpleasant odor is formed when protein breaks down. Under the influence of microorganisms, hydrogen sulfide gas is released. It gives off a rotten egg smell. Eating rotten eggs can lead to nausea, vomiting, and diarrhea. Symptoms of poisoning will appear within 6 to 72 hours after eating them.

Why do boiled eggs float on the surface?

All the 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 such a phenomenon as hard boiled popping up 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 collects in one place under the shell. Most often from his dumb side. You can smash and make sure that the air bag in the float is larger 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? I'll tell you how to check it now. To check the freshness of such a product, you need to break it on a plate. Fresh proteins are thick, if it is liquid, of a water consistency, then the egg is bad. Hard-boiled eggs, the yolk is bright yellow in color. If it is pale yellow, it means that it has already lost its nutritional quality. A good quail egg weighs 10 to 12 grams. If the testicle seemed very light to you, it means that it has already begun to dry out.

Unlike chicken eggs, quail eggs do not rot 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 quality testicle should be camouflage. If it is white or soft, then the product is not of high quality. You can also find out about the freshness by the location of the yolk. Breaking it down 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, place classes, share information with friends on social networks. Goodbye.