CBSE Notes for Class 6 Science Chapter 2 – Components of Food

Important Notes for CBSE Class 6 Science Chapter 2 – Components of Food. Components of Food Class 6 Notes and Study Material Download in PDF form.

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What do different food items contain:

We eat different type of food which is made up of different kinds of ingredients . These ingredients occur from plants or animals. These ingredients contain some constituent or component which is needed for our body to perform it’s basic functions. These constituent or component are called nutrients. Name of these nutrients are following.

  1. Carbohydrates
  2. Protein
  3. Fats
  4. Vitamins
  5. Minerals

Test for nutrients that contains our food items:

a) Test Carbohydrates / starch:

Food contain many type of carbohydrates . But main carbohydrates present in our food is in the form of starch and sugar.

Take a small quantity of food item and add two three drop of iodine solution if the colour of food item change in blue- black colour it’s indicate that food contain starch.

b) Test for Protein :

Take a small quantity of food item if it a solid make a paste first with the help of Moulton pistil , and put small quantity of food item in clean test tube , add 10 drop of water and shake well . Now using dropper add two drop of solution of copper sulphate and ten drops of solution of caustic soda. Shake well and stand the Test tube for few minutes. If violet colour appear it indicates Protein is present in the food item.

c) Test for fat :

Take s small quantity of food item , and press them into a piece of paper. And straight the paper if. Oily patches appear on the paper it means food items contain fat.

Why various nutrients needed for our body :

For proper growth of our body and fight against the diseases we need all different kinds of nutrients in a proper amount.

1) Carbohydrates :

Carbohydrates mainly provide energy to our body.

2) Fat :

Fat also give us much more energy as compared to carbohydrates . Fat and carbohydrates also called energy giving food.

3) Protein :

Protein needed for our boy growth and repair damage cell of our body.

4) Vitamins :

Vitamins helps in protecting our body against diseases . Vitamins A help in keeping our eyes and skin healthy , vitamins D helps to keep  our bones, and teeth healthy and vitamins C keep healthy our gums , and fight against diseases.

5) Minerals :

Mineral needed for our body to keep healthy and proper body growth.

Sources of different kinds of nutrients ;

1) Carbohydrates :

Wheat , rice bajra , maize mango melon potato , sweat potato , sugarcane etc.

2) Fat :

Milk , butter , cream , meat , egg, fish etc.

3) Protein :

Moong , gram , peas , meat, fish, paneer , eggs etc.

4) Vitamins :

Vitamins A:Papaya , carrot , mango , milk , fish oil etc.

Vitamin C :.   Orange , lemon , Tomato , Amla , green chilli , etc.

Vitamin D :.  Milk , butter , egg, fish , etc

Vitamins B : wheat , Rice , etc.

5) Minerals :

Iodine : Ginger , fish , etc

Phosphorus : Milk , Banana , green chilli , wheat , rice , etc.

Calcium  : egg, Milk etc.

Iron  : Spinach , meat , apple  etc.

Balance diet :

The diet which contains all the nutrients in a proper amount or in a right quantity , and  good amount of roughage and water , such diet is called balance diet .

Deficiency Diseases : 

Diseases that occur due to improper or minimum amount of nutrients for a long time are called deficiency Diseases.

Some diseases/ disorder cause by vitamins and minerals;

1) Blindness / loss of vision :

Symptoms :  poor vision , darkness ,

Cause :.      Lack of vitamin A .

2) Beriberi :

Symptoms :  weak muscle , minimum energy to work.

Cause.     :  Lack of  Vitamin B 1

3) Scurvy :

Symptoms: Bleeding gums , Weakness etc.

Cause.    : Lack of  Vitamin C

4) Rickets :

Symptoms : bone become soft and bent .

Cause.    : lack of Vitamin D

5) Bone and tooth decay :

Symptoms :  weak bone , tooth decay

Cause.     :.  Lack of calcium

6) Goiter :

Symptoms : gland in the neck swollen ,  mental disability in children .

Cause.    :.   Lack of iodine

7) Anaemia :

Symptoms :.    Weakness

Cause.     : Iron.

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