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Yoghurt contains living bacteria. Bacteria are also capable of anaerobic respiration. If a sealed carton of yoghurt is left for a long time, the lid bulges upwards. Why does this happen?
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Yoghurt contains living bacteria. Bacteria are also capable of anaerobic respiration. If a sealed carton of yoghurt is left for a long time, the lid bulges upwards. Why does this happen?

User Flowfree
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The bacteria is expanding underneath the surface of a container that is sealed, also the bacteria is spreading so it makes more room
by pushing the lid upwards
User Prusse
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