So here we are with our third experiment – looking at chemical reaction and energy. After seeing Professor Bunsen work his magic with all his amazing experiments , we thought we investigate how chemical reactions can create energy. This experiment required placing a teaspoon or two of yeast into a plastic bottle and then adding some water – one cube of sugar before placing a balloon over the lid. We all were hoping the balloons would rise.
Student thoughts /predictions – ”I think it will rise because of the yeast – isn’t meant to make things rise? Will H ” The balloon will pop!” Oliver It will lean ‘- Keira
Results – WOW WEE! – amazing – the balloons all rose upright – some quicker than others – some bigger – some smaller.
Factors which we observed which influence the outcome:
- the amount of yeast
- the size of the bottle
- the amount of water
- mixing sugar with the yeast