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Les formes de l'énergie

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Les formes de l'énergie

  1. 1. L’énergie. Les formes de l’énergie. 1er Trimestre. Sixième
  2. 2. <ul><li>Si nous regardons autour de nous, nous voyons comment le vent bouge les feuilles des arbres ou comment le soleil chauffe les objets qu’auparavant étaient froids. Quand un objet bouge, il subit un changement. Cette transformation est une manifestation de l’énergie. </li></ul>
  3. 3. <ul><li>L’énergie est indispensable à la vie végétale, animale et humaine. Chacun trouve dans les aliments qu’il consomme l’énergie dont il a besoin pour vivre. </li></ul>
  4. 4. <ul><li>L’énergie peut se manifester de différentes formes : </li></ul><ul><li>Énergie cinétique ou du mouvement  ; celle des corps en mouvement. </li></ul>
  5. 5. <ul><li>Énergie lumineuse , comme celle du Soleil ou des ampoules, qui émettent de la lumière. </li></ul>
  6. 6. <ul><li>Énergie calorifique , comme celle des corps qui sont chauds. </li></ul>
  7. 7. <ul><li>Énergie sonore, comme celle des instruments de musique qui émettent des sons. </li></ul>
  8. 8. <ul><li>Énergie chimique , comme celle des aliments ou celle des piles. </li></ul>
  9. 9. <ul><li>Les êtres vivants utilisent aussi de différentes formes d’énergie. Nous bougeons, nous émettons des sons, nous émettons de la chaleur… </li></ul>
  10. 10. <ul><li>L’énergie est la capacité de produire des changements et elle peut se manifester de différentes formes . </li></ul>
  11. 11. EXERCICES <ul><li>1.- Écris le nom de quatre formes d’énergie. </li></ul><ul><li>2.- Indique la forme d’énergie qu’ont les objets suivants : </li></ul><ul><li>Une ampoule allumée. </li></ul><ul><li>Les pales d’un ventilateur </li></ul><ul><li>Les aliments </li></ul><ul><li>Les cordes d’une guitare </li></ul>

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