when a substance changes from one state of matter to another (e.g. by melting, boiling, condensing or freezing)
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How can you reverse a physical change?
by heating or cooling
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What happenes during a chemical reaction?
the bonds break and the atoms change places - the atoms from the substance you start off with (the reactants) rearrange themselves to form different chemicals. These new chemicals are called products.
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Which reaction is harder to reverse, chemical or physical?
Chemical
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Do physical reactions create new subtsances?
No - the original substances just change state
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Other cards in this set
Card 2
Front
How can you reverse a physical change?
Back
by heating or cooling
Card 3
Front
What happenes during a chemical reaction?
Back
Card 4
Front
Which reaction is harder to reverse, chemical or physical?
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