STD-4: CHAPTER-7: FOOD, EXERCISE QUESTION ANSWERS

 A.     FILL IN THE BLANKS.

1.      Carbohydrates and fats are the nutrients which provide _______ to our body.

Ans: energy

2.      Foodstuffs, containing _______, are called body building foods.

Ans: proteins

3.      _______ and _______ are the sources of Vitamin C.

Ans: Orange and lemon

4.      We can get ________ from iodised table salt.

Ans: iodine

5.      The roughage in our diet, helps the body to get rid of_______ food.

Ans: undigested

B.      WRITE TRUE OR FALSE FOR THE FOLLOWING STATEMENTS:

1.      All nutrients are important for our body.                                                                            True

2.      Our food should include more than one source of protein.                                            True

3.      Our body needs Vitamin C for healthy bones and teeth.                                                 False

4.      A balanced diet need not contain all the nutrients.                                                          False

5.      Old People, who are not very active, should eat more of fats and carbohydrates.   False

 

C.      TICK THE CORRECT OPTION.

 

1.      Calcium, Iron and Phosphorus are examples of-

(a)   Minerals        (b) Vitamins          (c)  Proteins       (d) Carbohydrates

      Ans: Minerals

2.      Protective foods are needed by our body for –

(a)   energy       (b) warmth           (c) health           (d) growth

      Ans: health

3.      A person, doing a lot of physical work, needs more of –

(a)   vitamins       (b)  minerals       (c) proteins       (d) carbohydrates

       Ans: carbohydrates

4.      Sugar contains mainly–

(a)   Carbohydrates       (b)  vitamins       (c) minerals       (d) fats

       Ans: carbohydrates

5.      The vitamin, that helps us to have good eye-sight, is Vitamin–

(a)   A       (b) B           (c) C           (d) D

      Ans: Vitamin A

D.     ANSWER THE FOLLOWING QUESTIONS IN BRIEF.

1.      Name the nutrients present in energy giving foods.

Ans: Energy giving foods contain fats and carbohydrates in them.

2.      State the main role of proteins for our body.

Ans: Proteins help our body to grow and repair the worn-out tissues.

3.      Name two food items, obtained from animals, that are good sources of proteins.

Ans: Milk and eggs, that are obtained from animals, are good sources of proteins.

4.      Name two minerals that are required for healthy bones and teeth. Also mention one food source that contains both of them.

Ans: Calcium and Phosphorus are required for healthy bones and teeth. Milk contains both calcium and phosphorus.

5.      Why are vitamins and minerals called ‘protective foods’?

Ans: Vitamins and minerals, protect our body from diseases and keep us healthy. So, foodstuffs containing vitamins and minerals are called protective foods.

E.      ANSWER THE FOLLOWING QUESTIONS.

1.      What are nutrients? Why are they necessary for our body?

Ans: i) Nutrients are substances, present in the food.

ii) They provide us energy, help us to grow, keep us healthy, disease free and strong. So, nutrients are necessary for our body.

2.      Why should we eat a balanced diet?

Ans: i) All nutrients are not available in any one food item.

ii) Absence of any one nutrient from our diet, over the years, can affect our growth and proper functioning of the body.

iii) A balanced diet contains all the nutrients, roughage and water in appropriate amounts.

So, we should eat a balanced diet.

3.      Why is it advisable to eat food items like whole fruits, salads and whole grains?

Ans: : i) Whole fruits, salads and whole grains contain fibres or roughage.

ii) These fibres helps our body to get rid of undigested food.

iii) Fibres also help us to avoid over-eating.

So, it is advisable to eat food items like whole fruits, salads and whole grains to get fibres.

4.      Why do we say that water is essential for proper functioning of our body?

Ans: i) Water helps in digestion of food and absorption of nutrients in our body.

ii) It also helps in throwing out wastes from the body.

Thus, water is essential for our body to function properly.

5.      ‘Old people need less of proteins, carbohydrates and fats than young children.’ Justify this statement.

Ans: i) Young children are very active, as they do a lot of work. They require more energy and strength. So, they need more proteins, carbohydrates and fats.

ii) But, old people are not very active. They need less energy. So, they need less carbohydrates, fats and proteins.