Kendriya vidyalaya c.r.p.f,avadi
Holiday home work for class VI science
24/12/2015
1.Name the bones which protect the heart from all sides.
Ans: ribcage in the front and backbone in the back.
2. Is burning of a piece of a paper is reversible or irreversible change?
Ans : It is irreversible change
3.Why do we need to separate different components of a mixture? Give an
example?
Ans: To get a pure substances or we need to separate or non useful substances
25/12/2015
1. Is it possible to separate sugar mixed with wheat flour ? If yes, How will you do
it?
Ans: Yes, By sieving.
2. What is a ball and socket joint? Draw the diagram.
Ans: The rounded end of one bone fits into the cavity (Hallow Space) of the other
bone. Such joint allows movement in all directions. Diagram refer textbook.
3.Light a candle and fix it on the ground observe the changes over certain period of
time. In what way the candle has changed? Can you get back the candle.
Ans: No, it is a irreversible change
26/12/2015
1.Why can our elbow not move downward?
Ans:our elbows have hinge joint. These allow movement in only one plane.
2.Which method is used to separate stones from rice?
Ans: Handpicking.
3. Sand from water is separated by –
Ans: Sedementation and decantation .
27/12/15
1. Draw a diagram showing the melting of wax in a pan is a reversible?
Ans: Diagram refer textbook.
2. What are the functions of skeleton?
Ans: (i)It gives shape
(ii).it forms frame work of the body.
(iii) it helps in movement of the body.
(iv) it also protects the internal organs
3. What is winnowing and sieving?
Ans:Winnowing is used to separate heavier and lighter components of a mixture by
wind or by blowing air.
The sieving removes pieces of stones, stalk and husk that may still remain with
wheat after threshing and winnowing.
28/12/15
1. How would you obtain clear water from a sample of muddy water?
Ans:We can obtain clear water from a sample of muddy water by the process of
filtration, sedimentation and decantation.
2. A Drawing sheet changes when you show a picture on it. Can you reverse
this change?
Ans:No, it is a irreversible change.
3. What are the differences between reversible and irreversible change? Give
an example.
Ans: Reversible:- The change
29/12/15
1.How many types of joints are there in our body? Name them.
Ans:There are four types of joints in our body
(i) Ball and socket joint
(ii) Hinge joint
(iii) Fixed joint
(iv)Pivotal joint
2. Growth of a plant is a __________ change?
Ans:Irreversible
3.What is a cartilage?
Ans: The skeleton are not as hard as the bones and which and be bent is called
cartilage
30/12/15
1.The method of separating seeds of paddy from its stalks is called _______.
Ans: threshing
2.The melting of ice candy is a ________ change.
Ans: reversible change
3.The contraction of the _ ________ pulls the bones during movement.
Ans: muscles
1/1/16
1.In cockroaches the body part helping in movement
Ans: Pair of legs and two pairs of wings.
2.A combination of bones and cartilages forms the ________ of the body.
Ans: skeleton
3.Which is a way to make a change happen?
(i)by heating
(ii)by cooling
(iii)by mixing a substance with another substance
2/1/16
1.Define evaporation?
Ans: The process of conversation of water into its vapour is called evaporation.
2.To walk through a waterlogged area, you usually shorten the length of your dress
by folding it. Can this change be reversed?
Ans: Yes , This change can be reversed.
3.what is a joint?
Ans:the region where two /more bones meet is called ajoint.
3/1/16
1.A thick coating of a paste of Paris(POP) is applied over the bandage immobilised
. Can the change in POP be reserved?
Ans:No,this change can’t be reserved.
2.The bones at the elbow are joining by a _________ joint.
Ans: Hinge
3.Define condensation?
Ans:The process of conversation of water vapour into its liquid form is called
condensation.