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13 cards from this deck
Change in appearance without forming new substances
Remain unchanged
Physical - still H2OH_2OH2O
Formation of one or more new substances
Colour change, gas, heat/light, precipitates
Iron oxide from iron + oxygen
No - material remains chemically identical
Easy to reverse
Yes - completely different materials created
Difficult or impossible to reverse
Heat, light, or sound often produced
Chemical - new substances (ash, gases) form
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