Resources:
• Video – Things are always changing – https://video.link/w/eKKnb
• A jar
• Food – you can use children’s food
• PowerPoint
• Worksheet

Engage
Show the video https://video.link/w/eKKnb to the children to make them aware that things around us are changing all the time. Use the PowerPoint to emphasis the fact that things change over time. For each slide, encourage the children to predict how the objects shown in the pictures will change, observe how they actually change and ask the children if the changes shown can be changed back (reversible) or not (irreversible).

Inquire:
Explain to the children that in their lunchbox they have delicious food, but then ask them: What will happen to the food if they leave it in a box for a very long time? After eliciting the children’s predictions, take out a jar and ask the children that if they want they can take some of their lunch and put it in the teacher’s jar to carry out an investigation. After collecting the food, ask the children to find a name for the jar. Label the jar with the chosen name and write the date when of the investigation started. Close the jar tightly and leave it on the window sill for about four months.

Assess and Evaluate:
Give the children the worksheet and ask the children to draw and label the food they put in the jar.
After a few months, show them the jar again and encourage them to compare and observe how the food in the jar changed. Give them the same worksheet and ask them to draw and label again the food with all the changes they can observe.