We used the following set up. We were trialling plastic delivery tubes – unfortunately the tubes weren’t the most convenient shape and so we had to use these large plastic bowls.
We allowed the thermometer time to equalise to the temperature of the yeast/sugar mixture then we started logging. We saw rapid production of gas (testing of a separate sample with limewater proved it was carbon dioxide).
We transferred the results to the computer and graphed our results. Pupils saw a 2 degree centigrade rise in temperature as the yeast respired (and used ICT usefully as well!)
Fiendishlyclever 