Q20Long answer
Describe an activity to demonstrate that warm air is lighter than cool air.
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Activity 8.6, Science Textbook, Class VII, NCERT or students may design any other activity and the teacher may verify the validity of the same.
Describe an activity to demonstrate that warm air is lighter than cool air.
Activity 8.6, Science Textbook, Class VII, NCERT or students may design any other activity and the teacher may verify the validity of the same.