expérience

 **LES RAISINS QUI DANSENT **      __ Matériel : __   Un verre transparent rempli à la moitié  Une cannette de Club Soda  6 raisins secs  __ Manipulation : __   Versez du soda dans le verre <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Versez les raisins secs <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Observez <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> __<span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Observations : __ <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Qu’avez-vous vu quand vous avez versé les raisins secs? <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Les raisins montent et descendent comme un ascenseur. <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Comment les raisins sont-ils remontés à la surface? <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Grâce aux bulles de gaz carbonique. <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> __<span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Eléments d’explications : __ <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> <span style="font-size: 14pt; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Le gaz carbonique s’est mis sur les raisins, ce qui a fait remonter les raisins à la surface comme une bouée. <span style="font-size: 14pt; line-height: 115%; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-ansi-language: FR-CA; mso-bidi-font-size: 12.0pt;"> Quand les bulles éclatent, les raisins descendent. <span style="font-size: 14pt; line-height: 115%; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-fareast-font-family: Calibri; mso-ansi-language: FR-CA; mso-fareast-language: EN-US; mso-bidi-font-size: 12.0pt; mso-bidi-language: AR-SA;"> Pascale Lacroix <span style="font-size: 12pt; line-height: 115%; font-family: ComicSansMS; mso-bidi-font-family: ComicSansMS; mso-fareast-font-family: Calibri; mso-ansi-language: FR-CA; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">