CBSE Class 6 Science 

Chapter 3: Fibre to Fabric 

NCERT Solutions

1. Classify the following fibres as natural or synthetic:

nylon, wool, cotton, silk, polyester, jute

Answer:
Natural fibres: wool, cotton, silk, jute
Synthetic fibres: nylon, polyester.

2. State whether the following statements are true or false:

a) Yarn is made from fibres.

b) Spinning is a process of making fibres.

c) Jute is the outer covering of coconut.

d) The process of removing seed from cotton is called ginning.

e) Weaving of yarn makes a piece of fabric.

f) Silk fibre is obtained from the stem of a plant.

g) Polyester is a natural fibre.

Answer:

a) True
b) False

c) False

d) True

e) True

f) False

g) False

3. Fill in the blanks:

a) Plant fibres are obtained from_________ and ________ .

b) Animals fibres are __________ and ___________ .

Answer:

a) Cotton plants and Jute plants.

b) wool and silk

4. From which parts of the plant cotton and jute are obtained?

Answer:
Cotton: Fruit(cotton bolls)
Jute: Stem

5. Name two items that are made from coconut fibre.

Answer:
We can make ropes and mats using coconut fibre.

6. Explain the process of making yarn from fibre

Answer:
The process of making yarn from fibres is called spinning. In this process, fibres from a mass of cotton wool are drawn out and twisted. This brings the fibres together to form a yarn. Simple devices like hand spindle and charkha, are simple hand operated spinning devices. Spinning of yarn on a large scale is done with the help of spinning machines. 

CBSE Class 6 Science 

Chapter 3: Fibre to Fabric 

Additional Questions

1. What is mean by fibres. Explain the different type of fibres with examples
2. What is mean by ginning of cotton?
3. In which states jute plant is cultivated in India?
4. What is mean by spinning?
5. What are two processes by which fabrics is made from yarns? Explain
6. What are steps involved in the preparation of fabric? Explain.
7. Explain how jute is obtained from jute plant
8. The fabric gets unravelled, if we pull a yarn from a torn socks. Why?

Answers

1. Fibres are thin strands of the thread used to make fabric. Fibres are of two types: Natural fibres and Synthetic fibres. The fibres obtain from plants and animals are called natural fibres. Examples Cotton, Jute, Silk and wool. The fibres are not obtained from plants and animals, but made from chemical substances are called synthetic fibres. Examples for synthetic fibres are polyester, nylon and acrylic.
2. The process of separating fibres from the cotton seed by the method of combing is called ginning of cotton.
3. Jute is mainly grown in West Bengal, Bihar and Assam in India.
4. The process of making yarn from fibres is called spinning.
5. Two main processes by which fabric are made from yarns are called weaving and knitting. Weaving is the process of arranging two sets of yarns together to make fabric. The weaving of yarns is done on looms. Looms are either hand operated or power operated.  Knitting is the process of make the fabric using a single yarn. Knitting is done with hands and also with machines.
6. The steps involved in the preparation of fabric are                                                                             a. Collecting the fibres                                                                                                                     b. Preparing yarns from the fibres by the process of spinning                                                         c. Fabrics is made from the yarn by the processes like weaving and knitting
7. Jute fibres are obtained from stem of jute plant. It is normally harvested when it is in the flowering stage. The stem of the harvested plants are immersed in water for few days. The stem rot and then fibres are separated by hand and then converted into yarns to make fabric.
8. The fabric gets unravelled, if we pull a yarn from a torn socks, because socks are made using single yarn by the process of knitting. 

CBSE Class 6 Science 

Chapter 3: Fibre to Fabric 

Fill in the blanks

1. Yarns are made up of ----------------.
2. ------------ are examples of fibres obtained from plants.
3. Polyester is an example of --------------
4. Cotton plants are usually grown at places having -------- soil and ---------- climate
5. The fruits of the cotton plant (cotton bolls) are about the size of a -------------
6. The process of combing of the cotton seeds to separate fibres are called --------------
7. Jute fibre is obtained from the --------- of a jute plant.
8. Jute plant is cultivated during the -----------season.
9. The process of making yarn from fibres is called--------------.
10. The two devices used for spinning are ------------- and ------------------.
11. The place where weaving is done is called --------------.
12. In ancient Egypt, ------------- and -------------- were cultivated to make fabric

Answers

1. Fibres
2. cotton and jute
3. Synthetic fibres
4. black, warm
5. lemon
6. ginning
7. stem
8. rainy
9. spinning
10. takli and charkha
11. looms
12. cotton and flax

CBSE Class 6 Science Chapter 2 NCERT Solutions

CBSE Class 6 Science 

Chapter 2: Components of Food 

NCERT Solutions

1. Name the major nutrients in our food.
Answer: The major nutrients in our food are carbohydrates, proteins, fats, vitamins and minerals.

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.

Answer:
(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 

Answer:
(a) Fats: Meat and Oil
(b) Starch: Wheat and Potato
(c) Dietary fibre: Fresh fruits and potato
(d) Protein: Milk and Egg

4. Tick (√) the statements that are correct.
(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. (   )

Answer:
(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.

Answer:

(a) Rickets
(b) Vitamin B1
(c) Scurvy
(d) Vitamin A

CBSE Class 6 Science Chapter 2 Additional Questions

CBSE Class 6 Science 

Chapter 2: Components of Food 

Additional Questions

1. What is meant by nutrients? What are the nutrients present in our food?
2. How can we find the presence of carbohydrates in our food?
3. Explain the test to find the presence of protein in our food
4. Why does the foods containing proteins are called body building foods?
5. Give a short note of vitamins its functions, types with examples
6. What is roughage? What is it function in our body? What are different sources of roughage?
7. How does water is useful in the functioning of our body?
8. What is meant by balanced diet?
9. What is meant by deficiency diseases? Explain with two examples  

Answers:

1. Nutrients are components present in the food, which is required for your body. The major nutrients present in our food are carbohydrates, proteins, fats, vitamins and minerals.
2. In order to test the presence of starch in the food item or a raw ingredient, we need to add 2-3 drops of dilute iodine solution into it. If the colour of food item/raw ingredient changes to blue-black, it shows the presence of starch in it.
3. In order to test the food item for protein, take it in a test tube. If it is in solid state, we need to powder or mash it and then dilute it with few drops of water, before doing the test. Then in the test tube add two drops of Copper Sulphate and ten drops of Caustic Soda into it. The colour of the food items changes to violet, which indicates the presence of protein in it.
4. Proteins helps in the growth of the our body. It also help us to repair the damaged cells and tissues. Hence the food containing protein are called 'body building foods'.
5. Vitamins help in protecting our body against diseases, keeping our eyes, bones, teeth and gums healthy. There are different kinds of vitamins required for our body. They are Vitamin A, Vitamin C, Vitamin K etc. Our body needs all types of vitamins in small quantities. Vitamin A keeps our skin and eyes healthy. Vitamin C helps body to fight against many diseases. Vitamin D helps our body to use calcium for bones and teeth
6. Roughage are dietary fibres, helps our body to get rid of undigested food. Even though it does not provide any nutrients to our body, it is essential component of our food. The main source of roughage are plant products such as whole grains and pulses, potatoes, fresh fruits and vegetables
7. Water helps our body to absorb nutrients from food. It also helps in throwing out some wastes from body as urine and sweat.
8. The Balanced diet is the diet which contains all the the nutrients that our body needs, in right quantities. It is required for the growth and maintenance of good health . The balanced diet will also contain a good amount of roughage and water. 
9. Diseases that occur due to lack of nutrients over a long period are called deficiency diseases. Two examples for deficiency diseases are Scurvy and goiter. Scurvy is caused due to the deficiency of Vitamin C and Goiter is due the lack of Iodine in our food.

Class 6 Science Chapter 2 Fill in the blanks

CBSE Class 6 Science 

Chapter 2: Components of Food 

Fill in the blanks

1. The components in the food which is needed in our body are called ------------------------
2. The main carbohydrates found in our food are in the form of  ------------- and ---------------.
3. The presence of starch changes the colour of the food item into ----------------colour, when Iodine Solution is added.
4. ------------ and ------------- is used to test the presence of protein in the food.
5. The presence of ----------- in the paper, when it is wrapped and crushed with food item, shows the presence of fat in it.
6. Food containing carbohydrates and fats are called ----------------------------.
7. ------------ are needed for the growth and repair of our body.
8. ------------help in protecting our body against diseases.
9. Vitamin A keeps our ------------- and ----------------healthy.
10. -------------helps our body to use calcium for bones and teeth.
11. ------------- is an example of 'carbohydrate rich' source of food.
12. Dietary fibres are also known as -------------------.
13. -------------does not provide any nutrients to our body.
14. ---------------help our body to get rid of undigested food.
15. -------------- help our body to absorb nutrients from food.
16. The ------------------ of many vegetables and fruits contains vitamins and minerals.
17. -------------- gets easily destroyed by heat during cooking
18. Eating too much of fat rich foods cause --------------.
19. The deficiency disease caused by the lack of Vitamin C is -----------------
20. Goiter is due to the deficiency of ----------------------.
21. Deficiency of iron causes -----------------.
22. Swollen glands in the neck is a symptom of -----------disease.
23. Beriberi causes due the lack of ----------------.
24. Bones becomes soft and bend due to the deficiency of -----------------.
25. Our body prepares -------------- in the presence of sunlight.

Answers:

1. nutrients
2. starch and sugars
3. blue-black 
4. Copper Sulphate and Caustic Soda
5. oil patch
6. energy giving foods
7. Proteins
8. Vitamins
9. skin and eyes
10. Vitamin D
11. Rice
12. roughage
13. Roughage
14. Roughage
15. Water
16. skin
17. Vitamin C
18. obesity
19. Scurvy
20. Iodine
21. Anaemia
22. Goiter
23. Vitamin B1
24. Vitamin D
25. Vitamin D

Class 6 Science Chapter 1 NCERT Solutions

CBSE Class 6 Science 

Chapter 1: Food: Where Does It Come From

NCERT Solutions

1. Do you find that all the living beings need the same kind of food?

Answer: 

No. All the living beings do not need the same kind of food.

2. Name five plants and their parts we eat?

Answer:

Spinach: leaves

Potato: Stem

Wheat Plant: Seed

Beetroot plant: Root

Mango Tree: Fruit

3. Match the item given in column A with that in Column B   

Answer:

Milk, curd, paneer, ghee  ---------  are all animal products

Spinach, cauliflower, carrot ------ are vegetables

Lions and tigers --------eat other animals

Herbivores ------ eat plants and plant products

4. Fill up the blanks with the words given           

    (herbivore, plant, milk, sugarcane, carnivore)

 (a) Tiger is a ____________________ because it eats only meat.

 (b) Deer eats only plant products and so, is called ______________.

 (c) Parrot eats only _________________ products.

 (d) The ________________ that we drink, which comes from cows, buffaloes and goats is an                   animal   product.

 (e) We get sugar from ___________________.

Answer:

 (a)  Carnivores
 (b)  Herbivores
 (c)  Plant

 (d) Milk
 (e) Sugar cane