NCERT solutions for class 6th science chapter 2 - Components of food

 

Chapter 2

Components of Food

Textbook exercise (on page no. 17)

Q1: Name the major nutrients in our food?

Ans: The major nutrients in our food are carbohydrates, proteins, fats, vitamins and minerals.

 Q2: Name the following :-

(a)  The nutrients which mainly give energy to our body – carbohydrates and fats.

(b) The nutrients that are needed for the growth and maintenance of our body – Proteins and minerals.

(c)  A vitamin required for maintaining good eyesight – Vitamin A

(d) A mineral that is required for keeping our bones healthy – Calcium

 Q3: Name two foods each rich in:

      (1) Fats – Mustard  oil and meat

      (2) Starch – Rice and mango

      (3) Dietary fiber – Pulses and potato

      (4) Protein – Gram and milk

Q4: State the statements that are correct:-

   (1) By eating rice alone, we can fulfill nutritional requirement of our body – Incorrect

  (2) Deficiency diseases can be prevented by eating a balanced diet – Correct

  (3) Balance diet for the body should contain a variety of food items – Correct

  (4) Meat alone is sufficient to provide all nutrients to our body – Incorrect

Q5: Fill in the blanks:-

(1) Rickets is caused by the deficiency of Vitamin D.

(2) Deficiency of Vitamin B1 causes a disease known as Beri – Beri.

(3) Deficiency of Vitamin C causes a disease known as Scurvy.

(4) Night blindness is caused due to deficiency of Vitamin A in our food.

Extra Questions:-  

Define

1.     Nutrients – The main component of food are carbohydrates, protein, fats, vitamins and minerals.

2.     Nutrition – This is the process of taking in food containing the nutrients that provide energy and help in growth development of the body.

3.     Balanced Diet – A diet which provides adequate amount of carbohydrates, fats, proteins, vitamins and minerals along with roughage and water to maintain a healthy body is known as balanced diet.

4.     Carbohydrates – The food which provides us energy to do work is called carbohydrates eg. Sugar.

5.     Starch – It is the major source of carbohydrate.

True and False:-

1.     Deficiency of Iron causes Anemia – True

2.     Vitamin D helps in clotting of blood – False

3.     Deficiency of Vitamin C causes Scurvy – True

4.     Carbohydrates and fats mainly provide energy to our body – True

5.     Some nutrients get lost in the process of cooking – True

6.     Dietary fibers are also known as roughage – True

Fill in the blanks:-

1.     Sea food is a rich source of Iodine.

2.     Vitamins helps in protecting our body against diseases.

3.     A solution of copper sulphate and Caustic Soda is used to detect the presence of proteins.

4.     Food containing proteins are often called body- building food.

5.     Vitamin B keeps our skin healthy.

6.     Iron is essential for forming hemoglobin in the blood.

MCQs:-

          1.     Which  of the following is a protective food

(a)  Milk

(b) Oils and fats

(c)  Fruits

(d) Cereals

Ans : (c) Fruits

2.     Goiter : swelling of thyroid glands occurs due to the deficiency of

(a)  Iron

(b) Potassium

(c)  Phosphorus

(d) Iodine

Ans : (d) Iodine

3.     Calcium is not required  for

(a)  Strengthing of  bones and teeth

(b) Blood clotting

(c)  Muscle contraction

(d) Conduction of nerve impulses

Ans : (d) Conduction of nerve impulses

4.     Which of the following is considered as body buildings food?

(a)  Proteins

(b) Vitamins

(c)  Fats

(d) Carbohydrates

Ans : (a) Proteins

5.     Our food prepares which type of vitamins in the presence of sunlight?

(a)  Vitamin D

(b) Vitamin A

(c)  Vitamin B

(d) Vitamin K

Ans :- (a) Vitamin D