PHYSICAL AND CHEMICAL CHANGES Class 7 Free Notes and Mind Map (Free PDF Download)
“Physical changes involve alterations in the shape, size, color, or state of a substance, such as melting ice or cutting paper, without forming new materials. Chemical changes, like rusting of iron or burning magnesium, result in the formation of new substances and are crucial in processes like digestion and photosynthesis. Rusting, a common chemical change, […]
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