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De soleil pur et d'eau fraîche

S1 E14
·
2020
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Expires on: 

For a long time, it was thought that plants grew only from the food found in the soil. At the end of the 18th century, the scientist Joseph Priestley and then Jan Ingenhousz conducted experiments on plants to understand how they live and regenerate the air around them. They will find that it is thanks to the sunlight.

Levels:
Secondary Grade 9 Grade 10
Subjects:
Science and technology Biology
Skills:
Self-Directed Learning Global Citizenship and Sustainability Innovation Critical Thinking
Themes:
Environment and Sustainable Development
French level:
B1: Threshold B2: Vantage
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E16 : L'Or élastique

3 min 46 s
Les peuples d'Amérique utilisaient depuis longtemps la sève d'hévéa, aussi appelé le caoutchouc. Les Européens vont l'importer et essayer de maîtriser cette matière aux propriétés prometteuses.
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E17 : Rien ne se perd, rien ne se crée, tout se transforme

3 min 51 s
At the end of the 18th century, Antoine de Lavoisier, mathematician and chemist, asserted that in all the reactions of these experiments: 'nothing is lost, nothing is created, everything is transformed' but he could not really prove it.
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E18 : Ça coule, ça flotte

3 min 46 s
When the king of Syracuse gave Archimedes the task of proving that a crown was not made only of pure gold, Archimedes discovered in his bath that 'any body immersed in a liquid undergoes, on the part of the latter, a thrust exerted from the bottom upwards and equal in intensity to the weight of the volume of liquid displaced.&…
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E19 : À la recherche de l'infiniment petit

3 min 42 s
Democritus already thought in ancient times that matter was composed of small and unbreakable particles which is termed 'atomos' in Greek . Thanks to Lavoisier and John Dalton, the notion of element and atom was defined.
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E20 : L'électricité, c'est de la chimie

3 min 27 s
At the beginning of the 19th century, the battery had just been invented and it was thought that there were several types of electricity. Michael Faraday looked at the quantity of gas that emanated from water when a current was passed through it and thus defined the electrolysis of water. In 1833, he published his observations and…
    Levels:
    Secondary Grade 9 Grade 10
    Subjects:
    Science and technology Biology
    Skills:
    Self-Directed Learning Global Citizenship and Sustainability Innovation Critical Thinking
    Themes:
    Environment and Sustainable Development
    French level:
    B1: Threshold B2: Vantage