YRS : DAV | Class 6 | Science | Chapter 2 | Food | DAV Science Book Solution
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In this video, we provide a complete and easy-to-understand DAV Science Book Solution for Class 6 Science – Chapter 2: Food.
📖 Subject: Science
🏫 Class: 6
📚 Chapter: 2 – Food
🎯 Content: Complete DAV Book Solutions
🌟 In This Video:
✅ Complete chapter explanation
✅ DAV Science book questions and answers
✅ Exercise solutions
✅ Important concepts from Food
✅ Easy and simple explanations
✅ Important questions for exam preparation
✅ Helpful for homework and revision
This video is specially prepared for Class 6 DAV students to make Science learning simple, clear and effective.
A. Fill in the blanks.
Question 1.
Living organisms need food to ______ and ______
Answer:
Grow, survive
Question 2.
Vitamins A, D, E and K are soluble in ______ whereas Vitamins B and C are______
soluble.
Answer:
Fat, water
Question 3.
The deficiency of ______ in the diet, causes a disease called Beri-Beri.
Answer:
Vitamin B
Question 4.
Vitamin K helps in ______ of blood.
Answer:
Clotting
Question 5.
The dietary fibres constitute ______
Answer:
Roughage
B.
Write True or False for the following statements.
2. Our skin makes vitamin E in the presence of sunlight. (False)
3. Deficiency of phosphorus can lead to anaemia. (False)
4. We should eat food that has all its essential components in the right proportion. (True)
5. Kwashiorkor occurs due to the deficiency of fat in diet. (False)
C. Tick (✓) the correct option.
1. When a drop of iodine was put on the cut surface of a potato, it
turned blue-black in colour. This indicates the presence of
(a) vitamin
(b) fat
(c) protein
(d) starch
Answer:
(d) starch
2. The deficiency of Vitamin A, in the diet, causes a disease known as
(a) scurvy
(b) rickets
(c) nightblindness
(d) Beri-beri
Answer:
(c) nightblindness
3. Iron is essential for
(a) growth of teeth and bones
(b) formation of haemoglobin
(c) functioning of the thyroid gland
(d) making muscles strong
Answer:
(b) formation of haemoglobin
4. A child, who has bow legs, is suffering from a deficiency disease,
known as
(a) scurvy
(b) rickets
(c) goitre
(d) anaemia
Answer: (b) rickets
5. The deficiency of proteins, in the diet of children, can cause a
disease known as
(a) marasmus
(b) rickets
(c) kwashiorkor
(d) anaemia
Answer:
(c) kwashiorkor
D. Answer the following
questions in brief.
1. Name the important sources of our food.
Important food sources are:
(a) Plants
We obtain fruits,
vegetables, cereals, pulses, sugar, oils, etc.
(b) Animals
We obtain milk,
eggs, meat, fish, honey, etc.
So the two main sources of food are plants and animals.
2. State the importance of carbohydrates in our
diet.
Carbohydrates are the main energy-giving nutrients in our food.
They provide the body with the energy needed for:
- Working
- Walking
- Playing
- Breathing
- All other activities
They are known as energy-givers.
3. Name the vitamin whose deficiency causes the
following diseases:
(a) Night
blindness → Vitamin A
(b)
Beri-beri → Vitamin B₁
(c) Scurvy
→ Vitamin C
(d)
Rickets → Vitamin D
4. Name any three minerals needed by our body.
Any three from the following:
- Calcium
- Iron
- Phosphorus
- Iodine
- Sodium
- Potassium
(Any three are correct.)
5. State the role of calcium in our body.
Calcium is essential for:
- Healthy bones and teeth
- Proper blood clotting
- Normal functioning of muscles and nerves
It is one of the most important minerals for
growth in children.
6. Write the full forms of the terms PEM and
PCM.
PEM
→ Protein–Energy Malnutrition
PCM
→ Protein–Calorie Malnutrition
These are conditions caused due to lack of proteins and energy in the diet.
E. Answer the following questions.
1. Name two sources of each of the following:
|
Nutrient |
Two Sources |
|
(a) Carbohydrates |
Rice, Wheat, Potato, Sugar |
|
(b) Proteins |
Eggs, Milk, Fish, Pulses |
|
(c) Fats |
Butter, Cheese, Groundnut, Ghee |
|
(d) Roughage (Fiber) |
Vegetables, Whole grains, Fruits |
|
(e) Vitamin A |
Carrot, Liver, Egg yolk, Milk |
|
(f) Vitamin C |
Orange, Lemon, Guava, Tomato |
2. Describe a test for each for detecting the
presence of the following in food:
(a)
Proteins – Biuret Test
Procedure:
- Add a few drops of copper sulphate (CuSO₄) to the food solution.
- Then add NaOH solution.
Observation:
- Violet or purple colour appears → protein present
(b) Starch
– Iodine Test
Procedure:
- Add iodine solution to the food.
Observation:
- Blue-black colour appears → starch present
(c) Fats
– Paper Test / Sudan III Test
Paper Test Procedure:
- Rub the food on brown paper.
- Hold it against light.
Observation:
- Greasy translucent mark appears → fats present
Sudan III Test Procedure:
- Add Sudan III stain to the food solution.
Observation:
- Red-stained oil layer appears → fats present
3. Why do we need proteins and how do they
affect our health?
Importance of Proteins:
- Proteins are body-building nutrients.
- They help in growth of muscles, tissues, and organs.
- Repair damaged cells and tissues.
- Strengthen the immune system.
- Lack of proteins can lead to stunted growth, weakness, and PEM (Protein–Energy Malnutrition).
4. Mineral X, Component Y, Disease Z
Given:
- Mineral X is essential for formation of Y, which transports oxygen.
- Deficiency of X causes disease Z.
Answer:
|
Mineral X |
Component Y |
Disease Z |
Symptoms of Z |
|
Iron (Fe) |
Hemoglobin |
Anaemia |
Weakness, fatigue, pale skin, dizziness, shortness of breath |
5. Deficiency of iodine is more common in
mountainous regions. Why?
- Iodine is mainly present in soil and water near the sea.
- Mountainous regions are far from the sea, and the soil is iodine-deficient.
- Crops grown in such soil also lack iodine, causing iodine deficiency.
6. What is a balanced diet? Why should we take
a balanced diet?
Balanced
Diet
A diet that contains all the essential nutrients (carbohydrates, proteins,
fats, vitamins, minerals, water, and fiber) in adequate amounts needed for proper growth, development,
and maintenance of health.
Why we
should take it
- Provides energy for daily activities.
- Helps in growth and repair of tissues.
- Strengthens the immune system.
- Prevents deficiency diseases.
- Maintains overall health and body efficiency.
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