5.6 describe a simple experiment to investigate carbon dioxide production by yeast, in different conditions

 5.6 

      •1. mix sugar, yeast and water in a test tube 

      •2. attach a bung with a tube leading to a second test tube of water 

      •3. place the test tube containing the yeast mixture in a water bath at a certain temperature 

      •1. leave the tube and count the bubbles in a given time 

      •2. repeat the experiment at different temperatures - as it increases the bubbles increase 

                •you could vary the sugar concentration or measure the volume of gas produced instead