Cambridge Secondary (7-9). Stage 7. MCE Science. Workbook - Unit 5: Food Chains and Food Webs - Question 16

Work in pairs. You will carry out an investigation using two pieces of bread. One piece of bread is dry. The other piece of bread has had water added to it so that it is damp. Talk about what could happen if you leave both pieces of bread in the same, warm environment for a few days.