NCERT Class 6 Science Chapter 2 Activity Answer

NCERT Class 6 Science Chapter 2 Activity Answer Solution Components of Food

Activity 1

Activity 1 asks us why we eat different types of food.

Answer: Our body needs different components/nutrients. These different components are carbohydrates, fats, proteins, vitamins, and minerals. These components are available only through different food sources.

Activity 2

Activity 2 asks us to know about various test to find the components of the food.

Answer: We use various test to know the presence of components of the food. They are as follows:

Test for carbohydrates: To check the presence of carbohydrate we treat food with iodine solution. Iodine solution is colourless but it reacts with the starch present in food and gives a blue colour.

Test for Proteins: Protein reacts with copper sulphate to give cupric ion ( a form of copper). Cupric ion reacts with caustic soda and gives a violet colour; higher the amount of protein, higher is the colour intensity. For example: if you put the above two solutions on a boiled egg only white portion will be pink, as the yellow portion contains only fat.

Test for fats: Fats on rubbing with paper leave greasy spot which allows light to pass partially.

Activity 3

Activity 3 asks us to cut a tomato into pieces and see if it contain water;

Observation: We see water in the tomato.

Explanation: Tomato and many other food components like cucumber, pumpkin, mango, litchi, etc contain water. If we compare all the foods in whole, apart from seeds, almost all type of food contains water.

See also: NCERT Class 6 Science Chapter 2 Components of Food Solution.

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Next: NCERT Class 6 Science Chapter 3 Fibre to Fabric Activity Explanation.