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Class VI >> Science >> Changes Around Us >> A1

Q1	On heating a substance, the motion of particles inside it _____________.
A	Increases
B	Halves
C	Decreases
D	Does not change

Q2	The process by which liquid is converted into gas is called __________.
A	Freezing
B	Melting
C	Condensation
D	Evaporation

Q3	What are changes that occur in long duration of time called?
A	Fast Changes
B	Slow Changes
C	Desirable Changes
D	Undesirable Changes

Q4	The process of converting gas to liquid is called _________.
A	Freezing
B	Evaporation
C	Condensation
D	Melting

Q5	A change in which no new substance is formed is called a ______________.
A	Physical Change
B	Reversible Change
C	Chemical Change
D	Irreversible Change

Q6	Which of the following is a fast Change?
A	Growth of Human Hairs
B	Burning of a Matchstick
C	Rusting of Iron
D	Growth of Plants

Q7	Which of these is an irreversible change?
A	Boiling of Water
B	Melting of Wax
C	Melting of Ice
D	Growth in Plants

Q8	The increase in size of matter on heating is called ____________.
A	Expansion
B	Contraction
C	Melting
D	Evaporation

Q9	A change which cannot be reverted back is called a ______________.
A	Reversible Change
B	Irreversible Change
C	Physical Change
D	Chemical Change

Q10	Melting of ice-cream is an example of _____________.
A	Physical Change
B	Irreversible Change
C	Chemical Change
D	Slow Change

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