An entertaining science: how to spend at home a chemistry experience to interest a child?
In high school they start chemistry no earlier than 8class, it is too difficult to perceive this science of children. But to prepare a schoolboy for the subject can be a very simple and boring way - by organizing the experience in chemistry at home. Such mini-experiments will help to look at science from the other side, and showing "chemical tricks" on a children's holiday will significantly increase the degree of fun.
To conduct an incredibly effective, but simple trick, you will need:
- a water-alcohol solution with an alcohol content of about 50%;
- tweezers or tweezers.
A pinch of salt should be added to the solution. Next, a note is placed in the solution with the help of tweezers. Those who first conduct such experience in chemistry, it is better to take a note of lesser dignity!
After the money is well soaked, theirshould once again pick up the tweezers and lightly shake the excess fluid from the paper. Now you can set fire! The fire will pass all over the bill, but no edge will even blanch. This is because the alcohol contained in the solution burns. In turn, the water, which has absorbed the paper, does not have time to evaporate.
Growing crystals is one of the popularhobbies, which offers entertaining chemistry. Experiments with crystallization are most often carried out on sugar, but no one surprises with sugar crystals. We offer a new and unusual spectacle - crystals grown on eggs!
Crystal eggs can be obtained with the help of:
- alum (sold at the pharmacy);
- glue PVA;
Crystals on eggs will grow very fast, totalper day. It is necessary to wash the shell and dry it thoroughly. After that, eggs are smeared with glue and sprinkled with alum. Now they need to rest for a few hours to dry out again.
Further, the dye must be dissolved in twoglasses of plain water. The amount of dye can be chosen independently, in this case only the intensity of the color of the crystals depends on it. Eggs are placed in the dye for a day or a day. The longer the egg lies in the solution, the larger the crystals grow. Giving ready-made crystal eggs is neat - they are fragile enough.
Balloon on the bottle
How can you inflate a ball without helium without applyingphysical effort? To do this, you can use the usual baking soda and vinegar, which stand in the closet in the kitchen of every mother. To conduct this experience in chemistry, you will need:
- 3-4 teaspoons of soda;
- table vinegar.
Soda is dumped directly into the ball with a funnelor spoons. After that, he is put on a bottle with a small amount of vinegar. As soon as soda from the ball begins to wake up in the bottle, it starts to swell, as if from helium. This is due to the fact that the vinegar reacts with soda, releasing carbon dioxide. The balloon is inflated due to gas for a few seconds, just catch it!
Multi-colored layers in a bottle
The next experience in chemistry will clearly explain to the child the notion of fluid density. For this we will use:
- a quarter of a glass of sunflower oil;
- a quarter of a glass of water, tinted in any bright color;
- a quarter of a glass of sugar syrup (for a spectacular focus, it's also worth adding a dye).
The child can in advance assume thatwill occur when all these liquids are mixed. He will like the result - the syrup will settle down as the most dense, the water will be located in the middle, and the oil will remain on top. You can experiment with colors and liquids, making unimaginable compositions. For example, adding a different amount of sugar in a syrup, it will be possible to get several liquids of different density.
Laboratory experiments in chemistry can be quite boring. Such spectacular and simple tricks will help to encourage the child to study science and just entertain on a rainy day.