HARD
7th CBSE
IMPORTANT
Earn 100

Is the popping of a popcorn a physical change or a chemical change? Justify.

Important Questions on Changes of Matter

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>ACTIVITY 1

Observe the given changes and fill in the suitable word from the box. 

Size state shape colour

Melting, condensation, and evaporation 
Change in _____.

MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>ACTIVITY 1
Observe the given change and fill in the blank with a suitable word from the box. 
Size state shape colour
Drawing copper into a wire 
Change in _____.
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>ACTIVITY 1
Observe the given changes and fill in the suitable word from the box. 
Size state shape colour
Breaking glass 
Change in _____.
 
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>ACTIVITY 1
Observe the given changes and fill in the suitable word from the box. 
Size state shape colour
Blowing of balloons 
Change in _____.
 
MEDIUM
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>ACTIVITY 1
Observe the given changes and fill in the suitable word from the box. 
Size state shape colour
Heating an iron nail till it is red hot 
Change in _____.
 
HARD
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>ACTIVITY 4
Arrange the following changes suitably under chemical or physical changes: 
• boiling of water 
• lighting a match 
• ripening of a fig 
• rusting of a nail 
• melting ice cream 
• digestion of food 
• tearing of clothes 
• chewing a food 
• breaking of a stick 
• burning gas in a stove 
• sawing wood 
• stretching a rubber band
 
EASY
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 1
Freezing of water is a
EASY
7th CBSE
IMPORTANT
New Science Spark Book 7>Chapter 7 - Changes of Matter>Put on your THINKING CAP!>Q 1
Which of these is a chemical change?