how can we recognize physical and chemical changes (for science lab please help!)
an example of a physical change would be like if you cut a piece of paper in half, because you can physically change it back by taping it or whatever. if it were a chemical change, you could do something like burn half of the paper off. you can't chemically change it back to its original state.
chemical change has to do with colour, odour, any smoke or changes to it, physical is a change in which no new substance is formed the change can be in shape, form or state, no change in composition
perfect thank you!
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