CBSE Class 6 Science Chapter 7 Getting to Know Plants NCERT Solutions

CBSE Class 6 Science 

Chapter 7: Getting to Know Plants

NCERT Solutons

1. Correct the following statements and rewrite them in your notebook.

(a) Stem absorbs water and minerals from the soil.

(b) Leaves hold the plant upright.

(c) Roots conduct water to the leaves.

(d) The number of petals and sepals in a flower is always equal.

(e) If the sepals of a flower are joined together, its petals are also joined together.

(f) If the petals of a flower are joined together, then the pistil is joined to the petal.

Answer:

(a) Roots absorbs water and minerals from the soil.

(b) Stems hold the plant upright.

(c) Stems conduct water to the leaves.

(d) The number of petals and sepals in a flower is not always equal.

(e) If the sepals of a flower are joined together, its petals are not necessarily joined together.

(f) If the petals of a flower are joined together, then the pistil is not necessarily joined to the petal.

2. Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 7.3.

Answer:

3. Can you find a plant in your house or in your neighborhood, which has a long but a weak stem? Write its name. In which category would you classify it?

Answer:
Money plant has a long but week stem. It belongs to the category of climbers.

4. What is the function of a stem in a plant?

Answer:
Stem hold the plant upright. It transports water and minerals from root to the leaves. It transports food from the leaves to other parts of the plant. Stem hold branches, flowers, fruits etc

5. Which of the following leaves have reticulate venation?

Wheat, tulsi, maize, grass, coriander (dhania), China rose

Answer:
The plants have leaves with reticulate venation are tulsi,coriander, china rose.

6. If a plant has fibrous root, what type of venation do its leaves likely to have?

Answer:
If a plant has fibrous root, its leaves likely to have parallel venation.

7. If a plant has leaves with reticulate venation, what kind of roots will it have?

Answer:
If a plant has leaves with reticulate venation, it will have taproots.

8. Is it possible for you to recognize the leaves without seeing them? How?

Answer:
It is not always possible to recognize the leaves without seeing. but we can find the leaves by the size, shape and smell of the leaves to an extent.

9. Write the names of the parts of a flower

Answer:
The parts of the flower are petals, sepals, stamen and pistil

10. Which of the following plants have you seen? of those that you have seen, which one have flowers?

Grass, maize, wheat, chilli, tomato, tulsi, pipal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut

Answer:
Plants which I have seen are grass, maize, chilli, tomato, tulsi, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane
All the plants, which I have seen have flowers in it

11. Name the part of the plant which produces its food. Name this process.

Answer:
The parts of the plant which produce food are leaves. The process of making food by the leaves is called photosynthesis

12. In which part of a flower, you are likely to find the ovary?

Answer:
Ovary is found in the pistil, it is the lowermost part of the pistil.

13. Name two flowers, each with joined and separated sepals.

Answer:
Flowers with joined sepals are china rose and tomato
Flowers with separated sepals are jasmine and rose

CBSE Class 6 Science Chapter 7 Getting to Know Plants Additional Questions

CBSE Class 6 Science 

Chapter 7: Getting to Know Plants

Additional Questions

1. How the plants are classified based on their characteristics? Explain with examples
2. What is the difference between climbers and creepers? Give examples.
3. What is the function of a stem in a plant?
4. Explain the two parts of the leaves
5. What is leaf venation? Explain its types with examples
6. What is transpiration?
7. What is photosynthesis?
8. What is mean by fibrous roots? Give examples of plants having fibrous roots
9. How does the different plants of plants function?
10. What are the main parts of a plant?
11. What is difference between petals and sepals?
12. How does the type of roots is related to the leaf venations?
13. What is stamen? What are its parts?
14. What is pistil? what are its parts?
15. What are ovules?

Answers

1. Based on these characters most plants can be classified into three categories: herbs, shrubs and trees. Plants with green and tender stems are called herbs. They are usually short and may not have many branches. Example for herbs are mint, coriander, rice etc. Some plants have the stem branching out near the base. Plants are having hard but not very thick stems are called shrubs. Some examples for shrub are lemon, tulsi, rose etc. Plants with very tall, hard and thick brown stem are called trees.They have branches in the upper part, much above the ground.  Example for trees are banyan, peepal and neem.
2. Plants with weak stems that cannot stand upright and spread on the ground are called creepers, while those that take support on neighbouring structures and climb up are called climbers. Example for creepers are watermelon and pumpkin and examples for climbers are jasmine and grapes
3. Stems give support to the plants. It carries water and minerals to leaves. It carries the food prepared by the leaves to all the other parts of the plant.
4. The two parts of the leaf are petiole and lamina. Petiole is the part of the leaf by which it is attached to stem, while lamina is the broad green part of the leaf.
5. The design made by veins in a leaf is called the leaf venation. If this design is net-like on both sides of midrib, it is called reticulate venation. Example for reticulate venation are the leaves of mango, guava and hibiscus.  If the veins of the leaves are parallel to one another, it is called parallel venation. Examples of parallel venation are the leaves of grass, bamboo, wheat etc
6. Transpiration is the evaporation of water from the plants to air. Plants release water vapour through their leaves.
7. Photosynthesis is the process of preparation of food by the leaves of plants using carbon dioxide, water and chlorophyll in the presence of sunlight.  Oxygen is given out in this process
8. Fibrous roots are roots in which all the roots are similar and it does not have any main root. Example of plants which has fibrous roots are banana, wheat grass etc
9. In plants, roots absorb water and minerals from the soil and the stem conducts these to leaves and other parts of the plant. The leaves prepare food by using water,chlorophyll and carbon dioxide from the air in the presence of sunlight.  This food travels through the stem and is stored in different parts of a plant. We eat the different parts of the plant where the food is stored.
10. The main parts of a plant are stem, leaves, roots and flowers.
11. Petals are the prominent parts of the open flower.It is the coloured big leaf like structures of a flower.  Different flowers have petals of different colours. Sepals are the small green leaf like structures of the flower.
12. The plants having tap roots have reticulate venation, where as the the plants having fibrous roots have parallel venation.
13. Stamens are the male part of a flower. It has two parts, they are filament and anther
14. The innermost part of a flower is called a pistil. It has three parts, they are style, stigma and ovary.
15. Ovules are small bead like structures inside the ovary.

CBSE Class 6 Science Chapter 7 Getting to Know Plants Fill in the blanks

CBSE Class 6 Science 

Chapter 7: Getting to Know Plants

Fill in the blanks

1. Plants which have the stem branching out near the based is called ----------------
2. -------------- is an example for a herb
3. The part of a leaf which is attached to the stem is called -----------
4. The design made by veins in a leaf is called ------------
5. The venation which has a net-like design on both sides of midrib is called ------------.
6. Plants release a lot of water into the air through the process of ----------------
7. ------------ is given out in the process of photosynthesis.
8. The food prepared by leaves ultimately gets stored in different parts of plant as --------------. 
9. The innermost part of a flower is called ----------.
10. ---------- is the lowermost and swollen part of the pistil
11. Lemon is an example of a -----------
12. The broad, green part of the leaf is called --------.
13. Leaves prepare their food by the process of ----------.
14. The small bead like structures inside the ovary is called ------------.
15. Plants with weak stems that cannot stand upright and spread on the ground are called -----------
16. The thick vein in the middle of the leaf is called -------------

Answers

1. shrubs
2. rice
3. petiole
4. leaf venation
5. reticulate venation
6. transpiration
7. Oxygen
8. starch
9. pistil
10. Ovary
11. shrub
12. lamina
13. photosynthesis
14. ovules
15. creepers
16. midrib

CBSE Class 6 Science Chapter 6 Changes around Us NCERT Solutions

CBSE Class 6 Science 

Chapter 6: Changes around Us

NCERT Solutions

1. To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

Answer: Yes. This can be reversed by unfolding it

2. You accidentally dropped your favourite toy and broke it. This is a change you did not want. Can this change be reversed?

Answer: No. It cannot be reversed.

3. Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.

Answer: 

1. No

2. Yes

3. Yes

4. No

5. No

6. No

4. A drawing sheet changes when you draw a picture on it. Can you reverse this change?

Answer: It can be reversible if it is drawn with a pencil.

5. Give examples to explain the difference between changes that can or cannot be reversed.

Answer: Melting of ice into water is an example for reversible change, because we can get the ice by the freezing the water again. Where are burning of a paper into ash is an irreversible change because we cannot get the paper back from ashes received. 

Similarly, folding of a paper into a boat is a reversible change because we can get back the paper by unfolding it, whereas the cooking of food is an irreversible change because we cannot get the ingredients back from the cooked food

6. A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?

Answer: We cannot get Plaster of Paris back in its original form. Hence it is an irreversible change

7. A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?

Answer: No. It is an irreversible change

CBSE Class 6 Science Chapter 6 Changes around Us Additional Questions

CBSE Class 6 Science 

Chapter 6: Changes around Us

Additional Questions

1. What is mean by slow and fast changes. Explain with examples
2. What is mean by reversible changes and irreversible changes. Explain with examples

Answers

1. Changes which takes short period of time to occur are called fast changes. Examples of fast changes are blowing of a balloon, evaporation of water, melting of ice cream etc. Where as the changes takes a long period of time to occur  are called slow changes. Examples of slow changes are growing of plants and change of seasons
2.  The changes which can be reversed are called reversible changes. Example for reversible changes are evaporation of water, folding of paper to make aeroplane etc. Where as the changes that cannot be reversed are called irreversible changes. Example of irreversible changes are burning of paper, formation of curd from milk etc are irreversible changes

CBSE Class 6 Science Chapter 6 Changes around Us Fill in the blanks

CBSE Class 6 Science 

Chapter 6: Changes around Us

Fill in the blanks

1. Evaporation is a -----------------process
2. --------------is the opposite process of evaporation.
3. Metal rim is put on a wooden wheel of a cart by ------------
4. When the metal is heated, it ----------------
5. Contraction is reverse process of  -----------------

Answers

1. reversible
2. Condensation
3. heating
4. expands
5. Expansion

CBSE Class 6 Science Chapter 5 Separation of Substances NCERT Solutions

CBSE Class 6 Science 

Chapter 5: Separation of Substances

NCERT Solutions

1. Why do we need to separate different components of a mixture? Give two examples.

Answer: We separate different components of a mixture, to remove the harmful and non-useful substances. It is also done to separate two useful components in a mixture. For Example, Stones are from rice or wheat is separated out from it by the method of handpicking. In construction sites, pebbles and stones are removed from sand by sieving.

2. What is winnowing? Where is it used?

Answer: Winnowing is the method of separating components by wind or by blowing air. It is commonly used by farmers to separate lighter husk particles from heavier seeds of grain.

3. How will you separate husk or dirt particles from a given sample of pulses before cooking.

Answer: We can separate the husk or dirt particles from pulses by the method of handpicking. If the husk and dirt particles are bigger in size we can used the method of sieving to separate it out

4. What is sieving? Where is it used?

Answer: Sieving is the process of removing bigger impurities by using a sieve. It is used in the construction sites to remove the stones and pebbles from sand. It is also used in floor mill, to remove bigger impurities like husks and stones from wheat before grinding it.

5. How will you separate sand and water from their mixture?

Answer: Sand and water from their mixture can be separated from their mixture, by using the method of sedimentation and decantation or filtration. Pour the sand and water mixture in  a beaker and set aside for sometime. The sand settles down in the bottom of the beaker by sedimentation. Then the water is carefully taken out from the beaker  by the process of decantation or filtration.

6. Is it possible to separate sugar mixed with wheat flour? If yes, how will you do it?

Answer: Yes. Since sugar and wheat flour are difference in size, it can be separated by sieving. Since sugar particles are bigger in size, it remains in the sieve and wheat flour passes through it.

7. How would you obtain clear water from a sample of muddy water?

Answer: We can get the clear water from the muddy water by the process of sedimentation and decantation or filtration. Pour the muddy water in a beaker and set aside for sometime. We can see that the mud settles down in the bottom of the beaker by the process of sedimentaion. Then the clear water from the top is carefully removed out by the process of decantation. It is can also be filtered out by using filter paper. 

8. Fill up the blanks

(a) The method of separating seeds of paddy  from its stalks is called ___________.
(b) When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from  milk is an example of ___________.
(c) Salt is obtained from seawater by the process of ___________.
(d) Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called ___________.

Answer:

(a) Threshing
(b) filtration
(c) evaporation
(d) sedimentation and decantation

9. True or false?

(a) A mixture of milk and water can be separated by filtration.
(b) A mixture of powdered salt and sugar can be separated by the process of winnowing.

(c) Separation of sugar from tea can be done with filtration.

(d) Grain and husk can be separated with the process of decantation.

Answer:

(a) False
(b) False
(c) False
(d) False

10. Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar?

Answer: We should add the ice after dissolving sugar. More sugar can be dissolved, if we add it before adding ice, since the ability of a liquid to dissolve a substance is more when the temperature is more.

CBSE Class 6 Science Chapter 5 Separation of Substances Additional questions

CBSE Class 6 Science 

Chapter 5: Separation of Substances

Additional Questions

1. When method of handpicking is used to separate one substances from another?
2. Why do we separate substances?   
3. What is mean by threshing? When do we use this method of separation? 
4. What is winnowing? When is it used? 
5. When sieving is used to separate substances? Give an example.   
6. What is mean by sedimentation and decantation? 
7. Explain the uses of decantation with examples. 
8. Give two uses of Filtration in daily life. 
9. What is evaporation? 
10. What is mean by condensation?   
11. How we can separate a mixture of sand and salt.  
12. When a solution is said to saturated? How can we increase the saturation of a liquid?

Answers

1. This method of handpicking can be used for separating slightly larger sized impurities like the pieces of dirt, stone, and husk from wheat, rice or pulses. The quantity of such impurities is usually not very large.
2. Before we use a substance, we need to separate harmful or non-useful substances that may be mixed with it. Sometimes, we separate even useful components if we need to use them separately.
3. Thrashing is the process used to separate grain from stalks. In this process, the stalks are beaten to free the grain seeds. It is used to separate the grain seeds, which is difficult to pluck it out like mangoes and guavas
4. Winnowing is used to separate heavier and lighter components of a mixture by wind or by blowing air.This method is commonly used by farmers to separate lighter husk particles from heavier seeds of grain. The husk particles are carried away by the wind. The seeds of grain get separated and form a heap near the platform for winnowing. 
5. Sieving is used when components of a mixture have different sizes. To remove bigger impurities from floor, we use sieving. Sieving allows the fine flour particles to pass through the holes of the sieve while the bigger impurities  remain on the sieve. 
6. Sedimentation is the process in which the heavier component in a mixture settles when  water is added to it. Decantation is the process of separating the water without disturbing the settled particles.
7.  Decantation is used  to separate insoluble solids and liquids in a mixture. Mud present in the rain water can be separated by the process of decantation. Mixture of oil and water can also be separated by decantation. If a mixture of such liquids is allowed to stand for some time, they form two separate layers. The component that forms the top layer can then be separated by decantation.
8. The method of filtration is used to separate seeds and solid particles when we make juice. When we make paneer at home, the liquid substances is filtered using a fine cloth or strainer.
9. Evaporation is the process of conversion of water into its vapour.
10. Condensation is the opposite process of evaporation. It is the process of conversion of water vapour into its liquid form.
11. Take the mixture of sand and salt in a beaker and add some water to this. Leave the beaker aside for some time. The settled down at the bottom, can be separated by decantation or filtration. Now the boiled the filtered water, the water evaporates and the salt remains in the kettle.
12.  A solution is said to be saturated if it dissolves maximum amount of a substance and cannot dissolve the substance further. The saturation of  a given liquid can be increased by heating.

CBSE Class 6 Science Chapter 5 Separation of Substances Fill in the blanks

CBSE Class 6 Science 

Chapter 5: Separation of Substances 

Fill in the Blanks

1. -------------method is used to separate stones from rice, wheat and other pulses.
2. ------------process is used to separate grains from stalks.
3. Threshing can be done with help of ---------------- and ----------------.
4. The separated husk can be used as --------------. 
5. ------------ is used to separate heavier and lighter components of a mixture by wind or blowing air
6. ----------- is used at construction sites to separate pebbles and stones from sand.
7. ---------------- principle is used for separating a mixture of two liquids that do not mix with each other
8. -------------method is used to separate tea leaves from tea.
9. The dissolved salts from water is removed by the process of -------------.
10. The process of conversion of water vapour into its liquid form is called --------.  
11. ---------------can be used to separate components of a mixture of an insoluble solid and a liquid. 
12. ---------------- process is the opposite of evaporation.

Answers

1. Handpicking
2. Threshing
3. bullocks and machines
4. fodder for cattles
5. Winnowing
6. Sieve
7. Sedimentation and decantation
8. Filtration
9. evaporation
10. condensation
11. Filtration
12. Condensation

CBSE Class 6 Science Chapter 4 Sorting Materials into Groups NCERT Solutions

CBSE Class 6 Science 

Chapter 4: Sorting Materials into Groups 

NCERT Solutions

1. Name five objects  which can be made from wood.
Answer: Table, chair, paper, pencil, doors

2. Select those objects from the following which shine: Glass bowl, plastic toy, steel spoon, cotton shirt
Answer: The object which shine are glass bowl and steel spoon

3. Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects.

Answer: 
Book ---------- Paper
Tumbler --------- Glass and Plastic
Chair -----------Wood and Plastic
Toy ------------Plastic, wood, paper
Shoes -----------Leather, plastic

4. State whether the statements given below are True or False.
(i) Stone is transparent, while glass is opaque.
(ii) A notebook has lustre while eraser does not.
(iii) Chalk dissolves in water.
(iv) A piece of wood floats on water.
(v) Sugar does not dissolve in water.
(vi) Oil mixes with water.
(vii) Sand settles down in water.
(viii) Vinegar dissolves in water.

Answer: 
(i) False
(ii) False
(iii) False
(iv) True.
(v) False
(vi) False
(vii) True
(viii) True

5. Given below are the names of some objects and materials:
Water, basket ball, orange, sugar, globe, apple and earthen pitcher
Group them as:
(a) Round shaped and other shapes
(b) Eatables and non eatables

Answer: 
Round shaped: basket ball, orange, globe
Other shapes: apple, earthen pitcher, water, sugar
Eatables: water, orange, apple, sugar
Non eatables: basket ball, globe, earthen pitcher

6. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

Answer:
Some item float on water are paper, wood, Plastic ball, plastic bottle, balloons, etc. All these items will float in oil and kerosene as well.

7. Find the odd one out from the following:
a) Chair, Bed, Table, Baby, Cupboard
b) Rose, Jasmine, Boat, Marigold, Lotus
c) Aluminium, Iron, Copper, Silver, Sand

d) Sugar, Salt, Sand, Copper sulphate

Answer:
a) Baby
b) Boat
c) Sand
d) Sand

CBSE Class 6 Science Chapter 4 Sorting Materials into Groups Additional Questions

CBSE Class 6 Science 

Chapter 4: Sorting Materials into Groups 

Additional Questions

1. Give three examples for metals
2. What are soft and hard materials. Give examples
3. Give the names of some properties which describe the appearance of the material
4. When we say that a substance is soluble and insoluble in water. Give examples
5. 'Water plays an important role in the functioning of our body.' Which property of water make it important?
6. What are transparent materials? give examples
7. Why do Shopkeepers prefer to keep objects in transparent containers?
8. What are opaque objects? Give examples
9. What are translucent objects? Give examples
10. How does dividing materials in groups is helpful?
11. Give two properties of substances with which we can group them?

Answers

1. Iron, copper and gold are examples of metals.
2. Materials which can be compressed or scratched easily are called soft materials, while some other materials which are difficult to compress are called hard materials. For example, cotton or sponge is soft while iron  and gold are examples of hard materials.
3. The properties like lustre, hardness, rough or smooth etc describe the appearance of the material.
4. The substances which are completely disappear or dissolve in water are said to soluble in water. Example: Sugar and salt. The substances which  do not mix with water and do not disappear even after we stir for a long time are called insoluble substances. Example for insoluble substances are wood and plastic.
5. Water plays an important role in the functioning of our body, because it can dissolve a large number of substances.
6. The substances, through which things can be seen, are called transparent materials. Glass, water, air are examples of transparent materials.
7. Shopkeepers prefer to keep objects in transparent containers, because it makes him easy to locate the items and also it will be helpful for the buyers to see and choose easily.
8. The materials through which we are not able to see are called opaque materials.Examples for opaque materials are wood and metal.
9. The materials through which objects can be seen, but not clearly are known as translucent materials. Examples for translucent materials are  butter paper and thin sheets of plastic.
10. At home and shops, we usually store similar objects together. This help us to locate them easily. Dividing of materials in different groups is also helpful to study their properties and observe its patterns.
11. We can group the objects in such a way that whether they are soft or hard materials. We can also classify them whether they are  transparent, opaque or translucent.

CBSE Class 6 Science Chapter 4 Sorting Materials into Groups Fill in the blanks

CBSE Class 6 Science 

Chapter 4: Sorting Materials into Groups 

Fill in the blanks

1. ------------ dissolved in water is very important for the survival of animals and plants that live in water.
2. ------------ is an example of transparent material
3. Materials that have lustre are usually -----------------
4. The substances which do not disappear in water even after we stir a long time, are said to be  ----------- in water 

Answers

1. Oxygen
2. Glass
3. metals
4. insoluble

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