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NCERT Solutions for Class 6 Science Chapter 8 Body Movements are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 8 Body Movements.

NCERT Solutions for Class 6 Science Chapter 8 Body Movements

NCERT TEXTBOOK EXERCISES
(Pages 77-78)

Question 1.
Fill in the blanks :

(a) Joints of the bones help in the __________ of the body.
Answer:
Movement

(b) A combination of bones and cartilages forms the __________ of the body.
Answer:
Skeleton

(c) The bones at the elbow are joined by a __________ joint.
Answer:
Hinge

(d) The contraction of the __________ pulls the bones during movement.
Answer:
Muscles

Question 2.
Indicate True (T) or False (F) among the following sentences:
(a) The movement and locomotion of all animals is exactly the same. ( )
(b) The cartilages are harder than bones. ( )
(c) The finger bones do not have joints. ( )
(d) The forearm has two bones. ( )
(e) Cockroaches have an outer skeleton. ( )
Answer :
(a) F
(b) F
(c) F
(d) T
(e) T

Question 3.
Match the items in Column I with one or more items of Column II:

Answer :
(i) (d)
(ii) (a)
(iii) (e)
(iv) (b)
(v) (c)

Question 4.
Answer the following:

(a) What is a ball and socket joint?
Answer:
In ball and socket joints the rounded end of one bone fits into the hollow space of the other bone. In this type of joint, one bone remains fixed while the other can move freely in all directions.

(b) Which of the skull bones are movable?
Answer:
Lower jaw bones are movables.

(c) Why can our elbow not move backward?
Answer:
Our elbow can not move backward due to the hinge joint.

We hope the NCERT Solutions for Class 6 Science Chapter 8 Body Movements help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 8 Body Movements, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 7 Getting to Know Plants are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 7 Getting to Know Plants.

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

NCERT TEXTBOOK EXERCISES
(Page 64)

Question 1.
Correct the following statements and rewrite them in your notebook :
(a) Stem absorbs water and minerals from the soil.
Answer:
Roots absorb water and minerals from the soil.

(b) Leaves hold the plant upright.
Answer:
The stem holds the plant upright.

(c) Roots conduct water to the leaves.
Answer:
Stem conducts water to the leaves.

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

(e) If the sepals of a flower are joined together its petals are also joined.
Answer:
The statement is correct.

(f) If the petals of a flower are joined together, then the pistil is joined to the petal.
Answer:
The statement is correct.

Question 2.
Draw a leaf, a taproot, and a flower, you have studied for Table 7.3 (NCERT Book, Page 61).
Answer :
(a) Leaf

(b) Taproot

(c) Flower

Question 3.
Can you find a plant in your house or in your neighbourhood, which has a long but weak stem? Write its name. In which category will you place it?
Answer :
Yes, money plant. It belongs to creepers.

Question 4.
What is the function of a stem?
Answer :
A stem in a plant performs the following functions:

• It bears leaves, buds, flowers, fruits, etc.
• It conducts water from roots to the leaves and other parts and food from leaves to the roots.
• In some plants, it is also modified to store food.
• It upholds the plant upright.

Question 5.
Which of the following leaves have reticulate venation? Wheat, tulsi, maize, grass, coriander (dhania), China rose.
Answer :
Leaves having reticulate venation are Tulsi, Coriander (dhania), China rose.

Question 6.
If a plant has a fibrous root, what type of venation do its leaves have?
Answer :
Parallel’venation.

Question 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 then it will have taproots.

Question 8.
Is it possible for you to find out whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper?
Answer :
We cannot exactly recognize a leaf without seeing it. However, we might get some idea about the leaf by touching and smelling.

Question 9.
Write the names of the parts of a flower.
Answer :
Sepals, petals, stamen, pistil.

Question 10.
From the following plants, which of them have flowers? Grass, maize, wheat, chilli, tomato, tulsi, piped, shisham, banyan, mango, Jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut.
Answer :

Question 11.
Name the part of the plant which produces its food. Name this process.
Answer :
Leaves of the plant produce food by the process of photosynthesis.

Question 12.
In which part of a flower in which one has joined sepals and the other has separate sepals.
Answer :
Pistil. The ovary is the lowermost part of the pistil.

Question 13.
Name two flowers, in which one has joined sepals and the other has separate sepals. ,
Answer :
Flowers with joined sepals are in rose, ladyfingers, brinjal.
Flower with separate sepals in mustard and datura.

We hope the NCERT Solutions for Class 6 Science Chapter 7 Getting to Know Plants help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 7 Getting to Know Plants, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 6 Changes Around us are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 6 Changes Around us.

NCERT Solutions for Class 6 Science Chapter 6 Changes Around us

NCERT TEXTBOOK EXERCISES
(Page 51)

Question 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 change can be reversed.

Question 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. This change cannot be reversed. Breaking a toy is an irreversible change.

Question 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 :

Question 4.
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Answer :
No. We cannot reverse this change. Because we cannot get a fresh drawing sheet once a picture is drawn on it. But if the pencil is used to draw the picture, we can reverse the change.

Question 5.
Give examples to explain the difference between changes that can or cannot be reversed.
Answer :
One way we can group changes is to see if they can be reversed or not.

1. Changes that can be reversed: In such changes, we can return back to the original position if the cause of change is withdrawn; for example,
   • heating of milk,
   • drying of clothes,
   • knitting a sweater,
   • stretching a rubber band,
   • melting of ice, etc.
2. Changes that cannot be reversed: The changes in which we cannot go back to the original position, even if we withdraw the cause of change; for example,
   • boiling of egg,
   • making curd from milk,
   • making flour from grain,
   • the flowering of a bud,
   • producing biogas from cow dung, etc.

Question 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 immobilized. Can the change in POP be reversed?
Answer :
No, it’s not a reversible change.

Question 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’s not a reversible change.

We hope the NCERT Solutions for Class 6 Science Chapter 6 Changes Around us help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 6 Changes Around us, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances.

NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances

NCERT TEXTBOOK EXERCISES
(Pages 44-45)

Question 1.
Why do we need to separate different components of a mixture? Give two examples.
Answer:
We need to separate different substances present in a mixture for the following purposes :
(1) To remove the unuseful or harmful component.
For example – removing tea leaves after making tea.

(2) To obtain the useful component – For getting wheat/rice grains after separating husk, dirt, etc.

(3) To remove impurities for getting a pure sample,
For example – obtaining sugar crystals from jaggery (gur) or salt from seawater.

Question 2.
What is winnowing? Where is it used?
Answer :
Winnowing is the process of separating wheat or rice grains from the husk. Wheat grains and husk are different in weight, husk is lighter than wheat. When the mixture is allowed to fall down from a height, the wind carries the lighter husk with it and the heavy wheat grains fall vertically down on the ground.

Question 3.
How will you separate husk or dirt particles from a given sample of pulses before cooking?
Answer :
Husk or dirt particles are separated from pulses before cooking by hand-picking.

Question 4.
What is sieving? Where is it used?
Answer :
Sieving is the method to separate particles of different sizes. Undesirable particles can be separated from grains by this method. The size of holes in the sieves depends upon the size of the particles. In cashew nut factories, the cashew nuts of different sizes are separated by sieving. Jewellers also separate pearls of different sizes by this method.

Sieving flour before consuming is not a good practice. We should consume it along with the husk because husk provides roughage which is useful for our body in proper bowel movement.

Question 5.
How will you separate sand and water from their mixture?
Answer:
This can be done by taking a beaker or a glass tumbler half-filled with the given sample of water. Water is stirred thoroughly before keeping it undisturbed for some time. The sand being heavy settles down at the bottom of the beaker. Now, the clear water is poured into another beaker without disturbing the layer of sand with the help of a glass rod.

Question 6.
Is it possible to separate sugar mixed with wheat flour? If yes, how will you do it?
Answer :
Yes, we can separate sugar from wheat flour by sieving. In the mixture of sugar and wheat flour, sieving allows the fine flour particles to pass through the holes of the sieve, while the sugar particles remain on the sieve.

Question 7.
How would you obtain clear water from a sample of muddy water?
Answer:
Muddy water is cleared by the process of loading. Take a piece of alum, tied with a thread, it is swirled in water; then after some time, the water becomes clear on standing. The water becomes clear because the mud particles get loaded by the alum particles and become heavy. The loaded mud particles settle down at the bottom of the container. The water, therefore, becomes clear and can be decanted for further use.

Question 8.
Fill in 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) decantation

Question 9.
True or false:
(a) A mixture of milk arid 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

Question 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 ice to the lemonade after dissolving sugar. It would be possible to dissolve more sugar before adding ice.

We hope the NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances, drop a comment below and we will get back to you at the earliest.

NCERT Solutions for Class 6 Science Chapter 4 Sorting Materials into Groups are part of NCERT Solutions for Class 6 Science. Here we have given NCERT Solutions for Class 6 Science Chapter 4 Sorting Materials into Groups.

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

NCERT TEXTBOOK EXERCISES
(Pages 33-34)

Question 1.
Name five objects which can be made from wood.
Answer:

1. Table
2. Chair
3. Bed
4. Stool
5. Almirah

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

Question 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 :

Question 4.
State whether the statements given below are True of False ?
(1) Stone is transparent, while glass is opaque.
Answer:
False

(2) A notebook has lustre while eraser does not.
Answer:
False

(3) Chalk dissolves in water.
Answer:
False

(4) A piece of wood floats on water.
Answer:
True

(5) Sugar does not dissolve in water.
Answer:
False

(6) Oil mixes with water.
Answer:
False

(7) Sand settles down in the water.
Answer:
True

(8) Vinegar dissolves in water.
Answer:
True

Question 5.
Given below are the names of some objects and materials: Water, basketball, orange, sugar, globe, apple and earthen pitcher Group them as:
(a) Round-shaped and other shapes
(b) Eatables and non-eatables
Answer :
(a) (i) Round-shaped: Basketball, orange, globe, earthen pitcher.
(ii) Other shapes: Water, sugar, apple.
(b) (i) Eatables: Water, orange, sugar, apple.
(ii) Non-eatables: Basketball, globe, earthen pitcher.

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

• Oil
• Paper
• Wood
• Plastic mug
• Plastic plate
• Leaves
• Ice
• Wax

Question 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 (it is living while others are non-living).
(b) Boat (except it, all others are flowers).
(c) Sand (except it, all others are metals).
(d) Sand (except it, all others are soluble in water).

We hope the NCERT Solutions for Class 6 Science Chapter 4 Sorting Materials into Groups help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 4 Sorting Materials into Groups, drop a comment below and we will get back to you at the earliest.