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UNIT 7: MATTER
CHEMICAL CHANGES
Remember: In chemical changes, a substance changes into a different substance.
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There are different examples of chemical changes, but the most important is combustion.
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EXAMPLE OF COMBUSTION:
before: PAPER
after: ASHES + CARBON DIOXIDE

EXPERIMENT:
Imagine we have a piece of paper and we burn it. What colour is it? Can we change it again to the original state? Why?
Write another similar example/s.




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