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Les dinosaures :
Les géants de la préhistoire
Introduction
Les dinosaures étaient des reptiles qui ont vécu il
y a des millions d'années.
Ils ont été les animaux terrestres dominants
pendant environ 135 millions d'années.
Il y avait de nombreuses espèces de dinosaures,
de tailles variées, allant des petits aux très grands.
Les Types de Dinosaures
7
•Il y avait deux principaux groupes de
dinosaures: les saurischiens et les
ornithischiens.
•Les saurischiens avaient des hanches
de lézard (comme T. rex et Diplodocus).
•Les ornithischiens avaient des hanches
d'oiseau (comme Stegosaurus et
Ankylosaurus).
6
Quelques exemples de dinosaures
Diplodocus
T.rex Stegosaurus
Ankylosaurus
13
L’Extinction
•Les dinosaures ont disparu il y a environ
66 millions d'années, à la fin de la période
Crétacée.
•Il y a plusieurs théories sur les raisons de
cette extinction, notamment l’impact de
météore et des activités volcaniques.
•Après l'extinction des dinosaures, les
mammifères sont devenus les animaux
terrestres dominants.
14
Conclusion
•Les dinosaures étaient des
créatures fascinantes qui
ont vécu il y a longtemps.
•Bien qu'ils ne soient plus
parmi nous, nous pouvons
en apprendre davantage sur
eux grâce aux preuves
fossiles et à l'étude
scientifique.
26
La Fin
J'espère que vous avez apprécié la présentation. Merci.
Ilyas Touilila

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Lost World.pptx

  • 1. Les dinosaures : Les géants de la préhistoire
  • 2. Introduction Les dinosaures étaient des reptiles qui ont vécu il y a des millions d'années. Ils ont été les animaux terrestres dominants pendant environ 135 millions d'années. Il y avait de nombreuses espèces de dinosaures, de tailles variées, allant des petits aux très grands.
  • 3. Les Types de Dinosaures 7 •Il y avait deux principaux groupes de dinosaures: les saurischiens et les ornithischiens. •Les saurischiens avaient des hanches de lézard (comme T. rex et Diplodocus). •Les ornithischiens avaient des hanches d'oiseau (comme Stegosaurus et Ankylosaurus).
  • 4. 6 Quelques exemples de dinosaures Diplodocus T.rex Stegosaurus Ankylosaurus
  • 5. 13 L’Extinction •Les dinosaures ont disparu il y a environ 66 millions d'années, à la fin de la période Crétacée. •Il y a plusieurs théories sur les raisons de cette extinction, notamment l’impact de météore et des activités volcaniques. •Après l'extinction des dinosaures, les mammifères sont devenus les animaux terrestres dominants.
  • 6. 14 Conclusion •Les dinosaures étaient des créatures fascinantes qui ont vécu il y a longtemps. •Bien qu'ils ne soient plus parmi nous, nous pouvons en apprendre davantage sur eux grâce aux preuves fossiles et à l'étude scientifique.
  • 7. 26 La Fin J'espère que vous avez apprécié la présentation. Merci. Ilyas Touilila