Science

Book: Science having fun 40 activities in class or at home – Sciences et Avenir

When a molecule meets another molecule, what happens? Well … it depends on the molecules! It is the whole object of this book intended for children to show, with a great pedagogy, the extraordinary variety of material and the way in which one can easily, in his kitchen, with an extremely simple material, highlight many principles of physics. and chemistry. The author of “Science having fun: 40 activities in the classroom or at home” (editor De Boeck Supérieur, 15 euros, 95 pages), Tania Louis, is an expert on these questions. Scientific mediator, doctor in virology (recently signed the book “La Folle histoire des virus”, ed. Humensciences), regularly gives workshops in schools. His YouTube channel is also full of video “little manipulations”, which the QR codes within his “Fun Science” allow you to find with just one click.

The sneaky egg experiment

Obviously, you shouldn’t just watch Tania Louis videos – all the spice in the business is redoing experiences at home. We did it with two of them, starting with this surprising experiment that consists of making, by suction, a hard-boiled egg in a glass bottle. For that, you have to light matches that are left, a little, to burn inside the bottle. There they heat the air: “The molecules that compose it move faster and faster and occupy more and more space. This is called thermal expansion, the hotter the air, the more its molecules move away”, writes Tania Louis.

The rainbow of dyes

Then the egg must be placed in the neck of the bottle: it blocks the circulation of liquids and traps the dilated air inside. When it cools, it creates a suction … which allows the egg to slide into the bottle! … Another example of an experiment? The one that consists of creating a rainbow with colored candies soaked in a plate partially filled with warm water. The result is very beautiful. And the mixture of dyes will be, perhaps, an argument by parents to convince co-experimenter children that these are sweets that should not be abused (one can dream). The verdict of the manipulations? That science is definitely fun, and that these “40 Activities in the Classroom or at Home” make a nice gift to put under the tree at Christmas.

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