DAV Class 6 Science Chapter 2 Solution

DAV Class 6 Science Chapter 2 Solution: If you are looking for the Solution of DAV class 6 Science book Chapter 2 Food, then you are at right place. Here we provide complete solution of DAV class six The Living World science book.

DAV Class 6 Science Chapter 2 Solution

Highlights

• A. Fill in the blanks.
• B. True or False.
• C. Tick the correct option.
• D. Answer the following questions in brief.
• E. Answer the following questions.

A. Fill in the blanks.

1. Living organisms need food to ___________ and ___________.

2. Vitamins A, D, E and K are soluble in ___________ whereas Vitamin B and C are ___________ soluble.

3. The deficiency of ___________, in the diet, causes a disease called Beri-Beri.

4. Vitamin K helps in ___________ of blood.

5. The dietary Fibres constitute ___________.

Answer: (1) grow, survive (2) fat, water (3) vitamin B (4) clotting (5) roughage

B. Write True or False for the following statements.

1. Vitamins and minerals are body building foods.

2. Our skin makes Vitamin E in the presence of sunlight.

3. Deficiency of phosphorous can lead to anaemia.

4. We should eat food that has all its essential components in the right proportions.

5. Kwashiorkor occurs due to the deficiency of fat in the diet.

Answer: (1) False (2) False (3) False (4) True (5) False

C. Tick the correct option.

Answer:

1. starch

2. night blindness

3. formation of haemoglobin

4. rickets

5. marasmus

D. Answer the following questions in brief.

1. Name the important sources of our food.

Answer: The important sources of our food are plants and animals.

2. State the importance of carbohydrates in our diet.

Answer: Carbohydrates are made up of carbon, hydrogen and oxygen. In our food, these are present in the form of sugar and starch. Carbohydrates, in our diet, are a source of energy.

3. Name the vitamin whose deficiency causes the disease of–

(a) nightblindness

(b) beri-beri

(c) scurvy

(d) rickets

Answer:

4. Name any three of the minerals needed by our body.

Answer: (1) sodium (2) iron (3) calcium

5. State the role of calcium in our body.

Answer: The role of calcium in our body is to build healthy bones and teeth.

6. Write the full forms of the terms PEM and PCM.

Answer:

PEM = Protein – Energy – Malnutrition.

PCM = Protein – Calorie – Malnutrition.

E. Answer the following questions.

1. Name two sources of each of the following:

(a) Carbohydrates (b) Proteins (c) Fats (d) Roughage (e) Vitamin A (f) Vitamin C

2. Describe one test each for detecting the presence of the following in food:

(a) proteins

(b) starch

(c) fats

Answer:

(a) Test for Protein

Materials Required: Mortar and pestle, test tube, dropper, concentrated nitric acid. 

Procedure: Crush some bean seeds in a mortar and pestle. Make a suspension using water. Take a little of this suspension in a test tube. Very carefully, add a few drops of concentrated nitric acid to it. If the colour of this suspension changes to yellow, it indicates the presence of proteins.

(b) Test for Starch

Materials Required: Iodine solution, test tube, dropper

Procedure: Take the material which is to be tested. Add iodine solution with the help of a dropper If it turns blue-black, it indicates the presence of starch.

(c) Test for Fats

Material Required: Paper.

Take the given food item and rub it on a dry paper. If fat is present in it, it will leave a translucent mark on the paper.

3. Why do we need proteins and how do they affect our health?

Answer:

Proteins are the building blocks of life. Every cell in the human body contains protein. We need protein to help our body repair cells and make new ones. 

Proteins are made up of carbon, hydrogen, oxygen, nitrogen; and a small quantity of both sulphur and phosphorous. Proteins help in building up the developing tissues of a growing child. They also take care of the ‘wear and tear’ of the body tissues at all ages.

4. A mineral ‘X’ is essential for the formation of a component ‘Y’, in the blood of a person. The function, of component Y. is to transport oxygen in the body. The deficiency of mineral ‘X’, in the diet of a person, causes a disease Z. Identify X, Y and Z. Also mention the symptoms of disease Z.

Answer:

The mineral X is iron which is essential for the formation component Y which is haemoglobin and the disease Z is anaemia.

An anaemic person appears pale and weak. The body shows fatigue, loss of appetite, whitening of nails and swelling of hands and feet.

5. Deficiency of iodine is more common in mountainous regions. Why?

Answer: Deficiency of iodine is more common in mountainous regions because the soil and water are poor in iodine.

6. What is a balanced diet? Why should we take a balanced diet?

Answer: A diet that contains all the nutrients in right proportion is called balanced diet. We should take a balanced diet because it consists of all the nutrients which are important for the proper growth and development of the body.

Frequently Asked Questions on DAV Class 6 Science Chapter 2 Solution