Experiments with fire in physics title. “Young fireman” (experiments with children on fire safety). Rain from a cloud

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Making your children see you as a real wizard is very simple. All you need is sleight of hand and limitless fantasy. Science will do the rest for you.

website I have collected for you 6 elementary scientific experiments that will certainly make your children believe in miracles.

Experience No. 1

We will need one ziplock bag, water, food coloring blue, extra hands and a little imagination.

Color a small amount of water by adding 4-5 drops of blue food coloring.

To make it more realistic, you can draw clouds and waves on the bag, and then fill it with colored water.

Then you need to seal the bag tightly and stick it to the window using adhesive tape. You will have to wait a bit for the results, but it will be worth it. Now you have your own weather in your home. And your children will be able to watch the rain pour straight into the small sea.

Unmasking the trick

Since the Earth has a limited amount of water, there is such a phenomenon as the water cycle in nature. Under the warm sunlight the water in the bag evaporates, turning into steam. Cooling at the top, it again takes on a liquid form and falls as precipitation. This phenomenon can be observed in the package for several days. In nature this phenomenon is endless.

Experience No. 2

We will need water, clear glass jar with a lid (preferably a longer one), dishwashing liquid, glitter and heroic strength.

Fill the jar 3/4 full with water, add a few drops of dishwashing liquid. After a few seconds, add dye and glitter. This will help you see the tornado better. Close the container, unwind it in a spiral and admire it.

Unmasking the trick

When you swirl the can in a circular motion, you create a vortex of water that looks like a mini tornado. Water rotates quickly around the center of the vortex due to centrifugal force. Centrifugal force is the force within a guiding object or fluid such as water relative to the center of its circular path. Whirlwinds occur in nature, but there they are very scary.

Experience No. 3

We will need 5 small glasses, 1 glass of hot water, a tablespoon, a syringe and an inquisitive sweet tooth. Skittles: 2 red, 4 orange, 6 yellow, 8 green and 10 purple.

Pour 2 tablespoons of water into each glass. We count out the required number of candies and place them in glasses. Hot water will help the candies dissolve faster. If you notice that the candies are not dissolving well, put the cup in the microwave for 30 seconds. Then let the liquid cool to room temperature.

Using a syringe or large pipette, pour the colors into a small jar, starting with the thickest and densest (purple) and ending with the least dense (red). You need to drip the syrup very carefully, otherwise everything will get mixed up. First, it is better to drip onto the walls of the jar so that the syrup itself slowly flows down. You'll end up with rainbow Skittles jam.

Unmasking the trick

Experience No. 4

We will need a lemon, a cotton swab, a bottle, any decorations of your choice (hearts, sparkles, beads) and a lot of love.

Squeeze a little lemon juice into a glass and dip into it cotton swab, write your secret message.

To develop the inscription, heat it (iron it, hold it over the fire or in the oven). Be careful not to let children do this themselves.

Unmasking the trick

Lemon juice is an organic substance that can oxidize (react with oxygen). When heated, it acquires brown and “burns” faster than paper. Orange juice, milk, vinegar, wine, honey and onion juice also have the same effect.

Experience No. 5

We will need gummy worms, baking soda, vinegar, cutting board, sharp knife, two clean glasses.

Cut each worm into 4 pieces. It is better to slightly moisten the knife with water first so that the marmalade does not stick so much. Dissolve 3 tablespoons of baking soda in warm water.

Then we put our mini-worms in a solution with soda and wait 15 minutes. Then we take them out with a fork one at a time and put them into a glass with vinegar. They immediately begin to “overgrow” with bubbles and, dancing, “tear” to the surface.

Unmasking the trick

When you place baking soda-soaked worms in vinegar, the acetic acid reacts with the bicarbonate (from the baking soda). At the same time, bubbles of carbon dioxide form on the worms, which pull them to the surface, causing them to squirm. The bubbles burst at the surface, and the worm falls to the bottom, forming new bubbles that push it up again. This will continue until all the soda comes out of the worm. For the best effect, use about 4 worms at a time so that they can freely “dance” in the glass.

Experience No. 6

Playing with fire is extremely dangerous, but if the lights are turned off in the house and there is absolutely nothing to do, then you can play.

Let's get started:

1. Light a candle through a smoke trail. You will need a candle with a candlestick and a lighter. Light the candle, extinguish the flame, and then hold the lighter to the smoke trail. The flame will descend to the candle and it will flare up again.

2. Water lifts the candle. You will need a candle, a narrow glass, a lighter, a plate, water, and food coloring. Pour colored water into a plate, light a candle and cover with a narrow glass. The candle will rise up the glass.

3. Wax crayon candle. You will need a lighter, wax crayons, a plate and a clip. We fix the chalk in the clamp and set it on fire. It will burn like a candle.

4. Burning ping pong ball. You will need a metal tray, a lighter and ping pong balls. And the ball is on fire.

5. Burning swing. You need a nail, two glasses, a candle and a lighter. We pierce the candle with a nail in the middle, fasten it to the edges of the glasses and light it at both ends. The candle will begin to swing.

6. Fire in a bottle. You will need a lighter, alcohol and a tall bottle. Pour some alcohol into the bottle, shake it and set it on fire. The impression will be that the air inside the bottle is burning.

7. Singing trumpet. For this experience, prepare blowtorch and a metal tube. A metal strainer should be inserted into one side of the tube. We'll heat it up. Then you need to rotate the tube from horizontal to vertical position. When in a vertical position, the handset will make sound.

8. Black snake. You will need baking soda, sugar, alcohol, a bowl or plate and a lighter. Mix four parts sugar and one part baking soda, pour it onto a plate and set it on fire.

9. Fire tornado. You will need alcohol, a trash can (transparent), a metal container, and an old record player. We put the container in the basket, pour alcohol and set it on fire. Then we place the basket on the movable part of the player and turn it on.

10. Burning steel wool. You will need a piece of steel wool (a thin steel thread used for abrasive work), a tray and a lighter. Place the cotton wool on a tray and set it on fire.

But is it possible to describe in words what you will see as a result of these simple manipulations? Of course not. If you are afraid of starting a fire in your house, watch the video:

Today we will share interesting experiences with you. These are experiments with fire . They are very interesting to look at and no less easy to repeat. There will be 4 of them in total, and you will now see which ones.

1. Fire cloud in a bottle
2. Fire artist
3. Cold fire.

The essence of the first experiment is that you set fire to a banknote, which first lights up, but then goes out. At the same time, the bill itself remains unharmed.

For the experiment we will need:

Banknote (10; 50 rubles)

Ethyl alcohol (mix 60% alcohol + 40% water with water)

So, we dip the selected bill into the alcohol solution and wait 1-2 minutes so that it is well soaked. Next, we take out our money with tweezers and let the solution drain. Now you can set it on fire. The bill will light up, but after a few seconds it will go out. The secret is that when you ignite a bill soaked in an alcohol solution, the alcohol on its surface quickly burns out. The water does not have time to evaporate and the wet bill goes out.

Fire cloud in a bottle

For the second experience you will need:

• Antifreeze (winter windshield washer fluid for cars)
• Alcohol
• Matches
• Bottles (2 pieces).

Let's begin! Pour antifreeze into the first bottle, and alcohol into the second. Shake the liquids in each bottle so that they are evenly distributed along the walls of the bottles. Excess liquid can be drained. Then at the same time we bring matches to the necks of the bottles. That's all, you can observe. The spirit vapors, burning, will move along the walls of the bottles from top to bottom. For greater effect, the experiment should be carried out in the dark.

Fire artist

Children especially enjoy this experience. They are delighted that the fire itself “draws” shapes on a sheet of paper. And at the same time, they become interested in guessing what exactly the fire will draw on this sheet of paper.

For this experiment we will need:

• Matches
• Sheet of paper
• Pencil
• Potassium nitrate solution.

First you need to prepare a solution of potassium nitrate. To do this, it will be enough to mix a teaspoon of saltpeter with a teaspoon of water. Next, you need to apply any design to a sheet of paper with a solution of potassium nitrate. From the beginning of the drawing, use the same solution to draw a line, and at its end put a dot with a pencil. When the paper dries, the drawing will disappear. In order for the fire to start “drawing”, you need to light a match and bring it to the point. The drawing you drew will gradually appear before your eyes and will not disappear again.

Please note that the drawing should be drawn in one line, which should not be interrupted. In addition, the lines of the drawing should not intersect, because the fire may go in the wrong direction and the effect of the design will be reduced.

Cold fire

From a chemical point of view coldfire- This is a type of low-temperature flame. Organic and inorganic esters burn with this flame, for example, ethyl ether boric acid.

For the experiment we will need:

• Clew
• Ethanol
• Dry boric acid
• A drop of sulfuric and hydrochloric acid.

First you need to prepare the following mixture. Pour 1 spoon of alcohol into a porcelain cup, add the same amount of powdered boric acid and one drop of sulfuric or hydrochloric acid. Mix. Now we need to heat our mixture by steaming, 2-4 minutes will be enough.

It is harmful to apply this mixture to your hands, so you will need a small ball that can be wound from threads. When you wet the ball in the prepared mixture and set it on fire, the resulting boric acid ester will begin to burn. The flame has a barely noticeable greenish tint and does not burn. Those. At this stage you will not feel any heat. When all the ether has burned, ethyl alcohol may begin to burn and then your hand will become hot, which means the experiment should be completed, because he becomes dangerous.

Please note that when lighting the ball, the match should not come into contact with the threads of the ball.

Attention! Testing should be done near a sink or bathtub and under adult supervision.

Categories

And learn with them 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.

Experiments with eggs

Egg with salt

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:

• Table 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. 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 water to the existing salt water, the egg will gradually sink to the bottom.

Egg in a bottle

Did you know that a boiled whole egg can easily be placed in a bottle?

You will need:

• A bottle with a neck diameter smaller than the diameter 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 use 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 provokes 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 compress. Therefore, a low pressure is created in the bottle, and the external pressure forces the egg into the bottle.

Ball experiment

This experiment shows how rubber and orange peel interact with each other.

You will need:

• balloon
• Orange.

Instructions:

1. inflate balloon ik.

2. Peel the orange, but do not throw away the orange peel (zest).

3. Squeeze the orange zest over the ball until it pops.

Explanation.

Orange zest contains the substance limonene. It is capable of dissolving rubber, which is what happens to the ball.

Candle experiment

An interesting experiment showing ignition of a candle from a distance.

You will need:

• Regular candle
• Matches or lighter.

Instructions:

1. Light a candle.

2. After a few seconds, put it out.

3. Now bring the burning flame close 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 paraffin vapor reaches the wick, and the candle begins to burn again.

Soda with vinegar

A balloon that inflates itself is a very interesting sight.

You will need:

• Bottle
• Glass of vinegar
• 4 teaspoons soda
• Balloon.

Instructions:

1. Pour a glass of vinegar into the bottle.

2. Pour baking soda into the ball.

3. We put the ball on the neck of the bottle.

4. Slowly place the ball vertically while pouring the baking soda into the bottle with vinegar.

5. We watch the balloon inflate.

Explanation

If you add baking soda to vinegar, a process called soda slaking occurs. During this process, carbon dioxide is released, which inflates our balloon.

Invisible ink

Play secret agent with your child and create your own invisible ink.

You will need:

• Half a lemon
• Spoon
• 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 swab into the mixture and write something on white paper.

3. Wait until the juice dries and becomes completely invisible.

4. When you are 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 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 (can be a glass)
• Any effervescent tablets.

Instructions:

1. First, pour the juice into a glass so that it fills approximately 70% of the container’s volume.

2. Fill the rest of the glass with sunflower oil.

3. Now wait until the juice separates from the sunflower oil.

4. We throw a tablet into a glass and observe an effect similar to lava. When the tablet dissolves, you can throw another one.

Explanation

Oil separates from 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 to the top. The gas leaves the glass completely when it reaches the top, causing the juice particles to fall back down.

The tablet fizzes due to what it contains citric acid and baking 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 on top will eventually melt, which should cause the water to spill, but is this really so?

You will need:

• Cup
• Ice cubes.

Instructions:

1. Fill the glass warm water to the very edge.

2. Carefully lower the ice cubes.

3. Watch the water level carefully.

As the ice melts, the water level does not change at all.

Explanation

When water freezes to ice, it expands, increasing its volume (which is why even heating pipes can burst in winter). The water from melted ice takes up less space than the ice itself. Therefore, when the ice cube melts, the water level remains approximately 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 (possibly some kind of figurine).

Instructions:

1. Cut 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 weight.

6. We 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 weight pulls it down, but with the help of the lines, the parachute takes up a large area that resists the air, causing the weight to slowly descend. The larger the surface area of ​​the parachute, the more that 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 having the parachute tumble 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 home mini tornado much safer than the tornadoes shown on television in the American steppes.

Guys, we put our soul into the site. Thank you for that
that you are discovering this beauty. Thanks for the inspiration and goosebumps.
Join us on Facebook And VKontakte

There are very simple experiments that children remember for the rest of their lives. The guys may not fully understand why this is all happening, but when time will pass and they find themselves in a physics or chemistry lesson, a very clear example will certainly emerge in their memory.

website I collected 7 interesting experiments that children will remember. Everything you need for these experiments is at your fingertips.

Fireproof ball

Will need: 2 balls, candle, matches, water.

Experience: Inflate a balloon and hold it over a lit candle to demonstrate to children that the fire will make the balloon burst. Then pour plain tap water into the second ball, tie it and bring it to the candle again. It turns out that with water the ball can easily withstand the flame of a candle.

Explanation: The water in the ball absorbs the heat generated by the candle. Therefore, the ball itself will not burn and, therefore, will not burst.

Pencils

You will need: plastic bag, pencils, water.

Experience: Fill the plastic bag halfway with water. Use a pencil to pierce the bag right through where it is filled with water.

Explanation: If you pierce a plastic bag and then pour water into it, it will pour out through the holes. But if you first fill the bag halfway with water and then pierce it sharp object so that the object remains stuck in the bag, then almost no water will flow out through these holes. This is due to the fact that when polyethylene breaks, its molecules are attracted closer to each other. In our case, the polyethylene is tightened around the pencils.

Unbreakable balloon

You will need: a balloon, a wooden skewer and some dishwashing liquid.

Experience: Grease the top and bottom part product and pierce the ball, starting from the bottom.

Explanation: The secret of this trick is simple. In order to preserve the ball, you need to pierce it at the points of least tension, and they are located at the bottom and at the top of the ball.

Cauliflower

Will need: 4 cups of water, food coloring, cabbage leaves or white flowers.

Experience: Add any color of food coloring to each glass and place one leaf or flower in the water. Leave them overnight. In the morning you will see that they have turned different colors.

Explanation: Plants absorb water and thereby nourish their flowers and leaves. This happens due to the capillary effect, in which water itself tends to fill the thin tubes inside the plants. This is how flowers, grass, and big trees. By sucking in tinted water, they change color.

floating egg

Will need: 2 eggs, 2 glasses of water, salt.

Experience: Carefully place the egg in a glass with a simple clean water. As expected, it will sink to the bottom (if not, the egg may be rotten and should not be returned to the refrigerator). Pour into the second glass warm water and stir 4-5 tablespoons of salt in it. For the purity of the experiment, you can wait until the water cools down. Then place the second egg in the water. It will float near the surface.

Explanation: It's all about density. The average density of an egg is much greater than that of plain water, so the egg sinks down. And the density of the salt solution is higher, and therefore the egg rises up.

Crystal lollipops