NCERT - 7 - Science :: Physical and Chemical Changes

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Go To: NCERT-Science-Grade 7


[Contributor - Anu Nived]

Objective: To teach the students about various physical and chemical changes that happen around us

Subtopics to be covered:

- Difference between physical change and chemical change

- Crystallisation

- Galvanisation

Learning Outcome:

- Students can classify the processes into physical and chemical changes happening around them

- They know how iron rusts

[Contributor - Shachi Patel, Kripa S]

(Source - Bodhaguru) (Hindi - Physical and Chemical changes)

(Source - Smart Learning for All) (English - Physical vs chemical change)

[Contributor - Arshea Bimal]

1. Cut a piece of paper in four square pieces. Cut each square piece further into four square pieces. Keep these pieces on the floor or a table so that the pieces acquire the shape of the original piece of

paper.Can you join the pieces back to make the original piece? Is there a change in the property of the paper?

2.Group students to play this game:

a) Let one name a common process (eg: rusting of iron)

b) The other will decide if it is a physical or chemical change. The second student an now pick another and name another process. continue...

[Contributor- Dr. Nikitha Narayan]

Term Transliterated Term Translated Term
Chemical change केमिकल चेंज रासायनिक परिवर्तन
Chemical reaction केमिकल रीअक्शन रासायनिक अभिक्रिया
Crystallisation क्रिस्टलैसेशन क्रिस्टलीकरण
Galvanisation गलवनइसेशन यशद लेपन
Physical change फिस्कल चेंज भौतिक परिवर्तन
Rusting रस्टिंग जंग लगना
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