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Select a Standard
Growing up with time (Std I)
Know Your Body (Std I)
Discover the word (Std II)
Get the pests – you are the best (Std II)
Unscramble the jumble (Std III)
Teething Problems (Std III)
Starch in Me? (Std IV)
Internal Affairs (Std IV)
Food Web (Std V)
The sky above you (Std V)
Crystal Creation (Std VI)
We are there but cannot be seen (Std VI)
Formula of chemical compounds (Std VII)
Element word search (Std VII)
Starch in Me? (Std IV)
Conduct this activity after completing the topic on ‘Plant life’.
To help students to 
  • recall that plants store food in the form of starch.
  • detect the presence of starch in the given fruit or vegetable
  • use the detection test to identify different fruits, vegetables and food stuffs that contain starch.
Materials required
  • 1 plastic dropper
  • Small bottle of Iodine
  • Food stuffs like carrot, potato, apple, orange, papaya, tomato, milk, curds, rice, wheat and groundnuts.
  • 5 test tubes and filter papers

What's in Anchor

Instruction to the teachers

  •  Initiate a discussion by asking the following type of questions:
    i) How do plants prepare food?
    ii) How do the plants use the food prepared by them?
  • Explain how the food prepared by the plants that is stored as starch can be detected using a test.
  • Ask the children to do this activity in groups of 3.
  • Let them crush an apple or a potato in water.
  • Then, ask them to filter it using a filter paper, and collect the filtrate in a test tube.
  • Ask them to add a drop of iodine to the filtrate and record their observation.
  • Let them repeat this activity with the remaining food stuff.
  •  Initiate another discussion by asking the following type of questions:
    i) What changes did you observe in each case?
    ii) List the food stuffs in which the change was observed.
  • Explain to them that wherever a colour change was observed, i.e. the filtrate turned blue, it indicated the presence of starch on that food stuff.

Follow - up activities

  • Ask them to find out which food nutrient is starch.
  • Tell the students that there are tests to detect the presence of other food nutrients like fats and proteins too.