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Important Questions for Class 6 Science Changes Around Us -1


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In this page we have Important Questions for Class 6 Science Changes Around Us -1 . Hope you like them and do not forget to like , social share and comment at the end of the page.

Question 1

State True or False

(a) Evaporation of water is a reversible change
(b) Burning of the candle is an irreversible change
(c) Rusting of iron is a reversible change

(d) Bursting of cracker is fast change.
(e) Formation of Petrol is a slow change 
(f) Baking of dough into bread is a reversible change

Question 2

Fill in the Blank

1. Generally on heating metals ______

2. paper, petrol, LPG, CNG etc. are _________ substances

3. A change in which new substance is formed is called __________

4. A change that occurs during a definite time interval is known as _________

5. ______ is the process Heating of milk for boiling to kill microbes

6. dissolving sugar in water is a ____________

7. water changes into ice on cooling is an example of _______

8.  Those changes which are desired to occur that is we want them to take place are known _________

 

Question 3:

Match the column

 

Column A

Column B

A change in which new substance is formed

Non-periodic change

Changes in which physical properties like shape, size and state changes without formation of new substance

Slow change

Those changes which take place in a long period of time

Undesirable changes 

Those changes which we do not want to take place

Chemical changes

 

A change that does not repeat again and again after a regular interval of time

Physical changes

 

Burning of fuel is a

Irreversible change

 

Crossword

Solve the below crossword

important question for changes around us

Across

6. Changing of water vapour into water
7. Changing of water into gas on heating
Down
1. The burning of fuel on heating
2. Changing of ice into water on heating
3. drying of clothes is a
4. change of substance from liquid to solid state
5. Bursting of balloon is
6. cooking of food is a

 

Answer 1

 

  1. True
  2. True
  3. False
  4.  True
  5. True
  6. False

Answer 2

  1. expands
  2. Inflammable
  3. Chemical changes
  4. Periodic changes
  5. pasteurization
  6. Reversible change
  7. Reversible change
  8. Desirables changes


 

Answer 3

 

Column A

Column B

A change in which new substance is formed

Chemical changes

 

Changes in which physical properties like shape, size and state changes without formation of new substance

Physical changes

Those changes which take place in a long period of time

Slow changes 

Those changes which we do not want to take place

Undesirable changes

A change that does not repeat again and again after a regular interval of time

Non-periodic change

Burning of fuel is a

Irreversible change

 

 

 

 


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