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Subjects
Science CBSE
Class 7 New
Changes around us: Physical and Chemical
Pumpa Practice Questions
12.
Identify whether the given change is physical or not
Exercise condition:
5
m.
Decide whether the given change is physical or not physical and identify the correct reason.
Situation
Physical Change or Not?
Reason
Breaking chalk
Physical Change
Not a Physical Change
Colour changes completely
Smell is produced
It starts burning
Only size and shape change; no new substance is formed.
Burning paper
Physical change
Not a physical change
Only shape changes
New substances like ash and smoke are formed.
Only size changes
It becomes stronger
Melting butter
Physical Change
Not a Physical Change
It turns into gas only
Colour changes only
Only the state changes from solid to liquid.
New butter is formed
Rusting nail
Not a Physical Change
Physical Change
A new substance called rust is formed.
Only size changes
Water freezes on nail
Only state changes
Freezing juice
Not a Physical Change
Physical Change
The liquid changes into solid without forming a new substance.
Juice burns
Juice becomes metal
New powder forms
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