Help children understand more about irreversible changes like burning or baking with this Year 5 What Happens When Substances Change? Investigation Lesson.

Featuring a simple but engaging investigation using vinegar and bicarbonate of soda, children will also learn about fair testing and how to record and display their results. An accompanying worksheet is available to support children with turning their results into a bar chart. At the end of the lesson, further activities are suggested to try in the classroom or at home.

National Curriculum Objectives:

• Explain that some changes result in the formation of new materials, and that this kind of change is not usually reversible, including changes associated with burning and the action of acid on bicarbonate of soda.