Le déroulement d'une éruption volcanique

Lors d'une éruption volcanique, (roches en fusion situées en profondeur) monte le long de la cheminée. Cela se fait grâce à dissous dans qui sont chauffés et forment des bulles. Ces bulles remontent et entraînent avec elles . A la surface, les bulles éclatent, ne contient plus de , il devient .

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Description: collection d'exercices sur le thème des volcans (cycle 3). This is the main site of WIMS (WWW Interactive Multipurpose Server): interactive exercises, online calculators and plotters, mathematical recreation and games

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