Short answer questions I — task. Science State Board, Class 7.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Distinguish physical and chemical changes.

There are some physical changes and select them. The others are chemical changes.

New substance is formed.
Irreversible
Examples: Ice melting, paper tearing, freezing, and evaporation vaporisation
Property changes in reactants and products.
No new substance is produced.
Physical properties such as size, shape, and state change.
Example: Paper burning, photosynthesis, food digestion, and iron rusting.
Reversible

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