Provide learners with old magazines or supermarket advertisements from newspapers that contain pictures of different plant products. These could include sugar cane, tomatoes, lettuce, sunflower seeds, apples, carrots, etc.
Learners must search for these pictures, cut them out and paste them on the worksheet.
Under each picture, they should identify the part of the plant that we eat, e.g. leaves, stem or fruit.
For this part of the lesson the teacher will need different types of food.
Remind learners that plants make glucose, but they store starch.
Ask learners: Do you know what the difference is between a starch and a sugar?
Tell them that there is a test that can be done to find out whether a food contains starch or not. This test is called the Iodine Starch Test.
Learner Activity 5
WARNING: Do not allow the learners to taste any of the products used in the activity.
Display a variety of food products cut into small pieces in containers on the table.
Tell learners that if we drop iodine onto food, it will turns blue if it contains starch.
Divide the class into different groups and give each group an opportunity to come to the table to conduct the Iodine Starch Experiment: Learners select a variety of food types, place each food item into a separate bowl and use a dropper to drop iodine onto the different foods.