Practice Worksheet for Class 6 Science Chapter 6 Changes Around Us -1
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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
Answer 1
True
True
False
True
True
False
Answer 2
expands
Inflammable
Chemical changes
Periodic changes
pasteurization
Reversible change
Reversible change
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
