Épisode · Wiki Storia
S1 - E5 | The Hidden Secrets of Radioactivity
How can invisible rays go through objects?
On the road to knowledge with music for 3 to 6 year olds!
Today, we go on a journey to discover Invisible Rays.
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The adventure begins with a story and discoveries for 6 - 8 year olds!
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📝 Quick summary of key information
How can invisible rays go through objects?
Invisible rays, like X-rays and gamma rays, can go through some things without us seeing them. Paper, wood, and fabrics are like windows for these magic rays.
But watch out, some materials are like unbreakable walls for these rays. Metals and very thick objects stop them dead, just like a superhero stops a bad guy.
Radioactivity is a kind of invisible energy that can leave marks. Imagine tiny, invisible dots that show where the rays have been. These marks are like clues for scientists.
Scientists use these tracks to study invisible rays. They watch and analyze them, like detectives solving mysteries. Thanks to these tracks, they learn more about these fascinating rays.

The Hidden Secrets of Radioactivity
How can invisible rays pass through objects ?
The Ray Mission
After watching Marie Curie crush, heat, and mix rocks to extract precious radium (1), Zoé and Tom finally understand why this metal is so hard to find. Radium, hidden deep inside minerals (2), requires patience and precision. Meanwhile, a gray tiger-striped cat rubs against Zoé's legs, drawn to the warmth of the lab instruments (3). Marie Curie, always attentive, smiles as she sees the children marvel at the mysteries of science. She explains that radium emits invisible rays that can pass through certain materials. Tom, with his endless curiosity, then asks how these rays can pass through objects without destroying them. Marie Curie, with a mischievous look, decides to show them a fascinating experiment.
Marie Curie, with a mysterious smile, then says:
« You are going to play a fun game. Guess which objects block the rays. »
Tom, excited, says:
« Super, I'm ready! »
Zoé, excited, says:
« Me too! What do we have to do? »
Marie Curie, with a mysterious smile, invites the children to observe:
« Look at this plate. It shows the tracks of the invisible rays. »
Not long after, Marie Curie places different objects in front of a radium source. Zoé and Tom watch carefully. They see strange shadows forming on the plate. Tom, with his too-big safety glasses, finds out that some rays go through paper, wood, or even fabrics. Zoé, always precise, carefully writes down each observation in her notebook.
They see funny shadows on a special (4) plate... A secret picture appears, a clue to the future Nobel Prize!
The Mystery of the Shadows
Strange shadows keep forming on the sensitive plate, capturing the children's attention. Little by little, a secret drawing starts to appear, giving a precious clue towards the future Nobel Prize!
Zoé, after writing down her observations, explains to Tom:
« Invisible rays go through some objects. »
Tom, after looking carefully, says:
« The invisible rays draw shapes on the plate. »
Marie Curie, with a mysterious smile, explains:
« Exactly. The invisible rays go through some objects. »
Marie Curie explains that invisible rays pass through some objects. She tells that this technique helps to see invisible things. She used this method to discover radium and polonium (5).
Zoé, curious, then asks:
« How did you find these elements? »
Marie Curie, with a focused look, tells them:
« I saw the shadows of invisible rays. They showed me new things. »
Tom, amazed, shouts:
« Wow! This is amazing! »
Children, amazed by Marie Curie's discoveries and honors, feel ready to take on new challenges. Marie invites them to sit near her, around an old science book. She tells Zoé and Tom about the difficult moments of her research, but also the small victories that gave her hope. By listening carefully, they discover the strength of perseverance (6) and determination that guided Marie Curie in her scientific explorations. Zoé and Tom promise to keep exploring the mysteries of science, inspired by the example of their mentor. Marie Curie, with a warm smile, tells them they are ready for a new scientific adventure, full of surprises and discoveries.
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