EVENTS CONVENT HIGH SCHOOL
04/10/2021 CLASS-6 SESSION 2021-22
SUBJECT :Science
CHAPTER-2
COMPONENTS OF FOOD
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1. Name the major nutrients in our food.
Ans: The major nutrients in our food are carbohydrates, proteins, fats, vitamins and minerals.
The table below shows the nutrients present in some food items:
2. Name the following:
(a) The nutrients which mainly give energy to our body.
(b) The nutrients that are needed for the growth and maintenance of our body.
(c) A vitamin required for maintaining good eyesight.
(d) A mineral that is required for keeping our bones healthy.
Ans:
(a) Carbohydrates
(b) Proteins
(c) Vitamin A
(d) Calcium
3. Name two foods each rich in:
(a) Fats
(b) Starch
(c) Dietary fibre
(d) Protein
Ans:
(a) Ghee, butter,
(b) Raw potato, rice,
(c) Spinach, cabbage, carrot, ladies finger, (any two)
(d) Milk, egg, fish, meat, pulses (any two).
4. Tick (/) the statements that are correct, cross (X) those which dire incorrect.
(a) By eating rice alone, we can fulfill nutritional requirement of our body,
(b) Deficiency diseases can be prevented by eating a balanced diet.
(c) Balanced diet for the body should contain a variety of food items.
(d) Meat alone is sufficient to provide all nutrients to the body.
5. Fill in the blanks:
(a) ________ is caused by deficiency of Vitamin D. ,
(b) Deficiency of_________ causes a disease known as beri-beri.
(c) Deficiency of Vitamin C causes a disease known as________________ .
(d) Night blindness is caused due to deficiency of_______________ in our food.
Ans:
(a) Rickets
(b) Vitamin B1
(c) Scurvy
(d) Vitamin A
6.VERY SHORT ANSWER TYPE QUESTIONS
1. Do all meals consist of the same food items?
Ans: No, all meals do not have the same food items.
2. Why should a meal have different food items?
Ans: A meal should have different food items because our body needs different kinds of nutrients for proper functioning.
3. Do all foods contain all the required nutrients?
Ans: No, all foods do not contain sill the nutrients required by our body.
4. Name two main types of carbohydrates found in our food.
Ans:
(i) Starch (ii) Sugar
5. What are carbohydrates?
Ans: The compounds of carbon, hydrogen and oxygen which provide energy for our body are called carbohydrates.
6. What happens when two or more drops of iodine solution fall on starch substance?
Ans: The colour of the substance becomes blue-black.
7. If any food item gives blue-black colour with iodine then which nutrient is present in the food?
Ans: Starch.
8. Name two substances which provide carbohydrates.
Ans:
(i) Potato
(ii) Rice/wheat/maize/sugar
9. Name the food nutrient indicated by an oily patch on paper.
Ans:An oily patch on paper shows the presence of fat.
10. Name two energy-providing nutrients.
Ans:
(i) Carbohydrates
(ii) Fats
7. SHORT ANSWER TYPE QUESTIONS
1. What are nutrients? Name major nutrients.
Ans: The components of food which are needed by our body for growth and development are called nutrients. The major nutrients are:
(i) Carbohydrates
(ii) Fats
(iii) Proteins
(iv) Vitamins
(v) Minerals
2. What are the functions of carbohydrates?
Ans: They complete the energy requirements of the body so they are called energy providing food.
3. Write test for detecting the presence of starch.
Ans: Take a piece of the food item. Put 2-3 drops of dilute iodine solution on it. If the colour of the food item becomes blue-black, then it indicates the presence of starch in the food item.
(i) Food + Iodine — Blue-black colour (starch present)
(ii) Food + Iodine — No blue-black colour (no starch present)
4. What are the functions of proteins?
Ans: Proteins are the most important nutrient. They are called body-building food. They help in the growth and repair of damaged cells and tissues of the body. They also help our body to fight against infections. Proteins make our nails, hair and muscles.
5. How can you test presence of proteins in a given food item?
Ans:Take a small quantity of the food item. If the sample is solid, grind it. Put some part of this in a clean test tube, add 10 drops of water to it and shake the test tube. Now, with the help of a dropper, add two drops of solution of copper sulphate and 10 drops of solution of caustic soda to the test tube. Shake well and place the test tube in test tube stand for a few minutes.
Observe colour of the contents of test tube. If colour of the contents turns violet, the food item contains protein.
Note: Copper sulphate and caustic soda solutions are harmful. Handle them with care.
Food + water + copper sulphate + caustic soda → violet colour → protein is present.
