# 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

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