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vacuum flask

What happens and why?. Flask A. Flask B. thermometer. cotton wool. dead seeds. l iving seeds. vacuum flask. Method. The experiment was set up as follows. In flask A seeds were boiled for 10 minutes, allowed to cool and then soaked in disinfecting solution for 10 minutes.

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vacuum flask

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  1. What happens and why? Flask A Flask B thermometer cotton wool dead seeds living seeds vacuum flask

  2. Method • The experiment was set up as follows. • In flask A seeds were boiled for 10 minutes, allowed to cool and then soaked in disinfecting solution for 10 minutes. • In flask B seeds were soaked in disinfecting solution. • The flasks were left in the same place. • After two days the temperature inside the flasks was recorded.

  3. Results

  4. Discussion • 1. Why were the seeds in flask A boiled? • 2. Both sets of seeds were soaked in disinfectant. Why is this necessary? • 3. How can you explain the difference in temperature between the two flasks? • 4. Why was it necessary to use insulated (vacuum) flasks for the experiment? • 5. What factors were controlled to ensure the experiment was a fair test?

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