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Which of these is evidence that a chemical reaction has happened? Question 1 options: ice melting something dissolving in water formation of bubbles sugar crystals appearing when a cup of sugar water evaporates
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18 votes
Which of these is evidence that a chemical reaction has happened?

Question 1 options:

ice melting


something dissolving in water


formation of bubbles


sugar crystals appearing when a cup of sugar water evaporates

User Ged Byrne
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1 Answer

5 votes
I think it would be the formation of bubbles because, ice melting, something dissolved in water, and sugar crystals forming, are all physical changes. They are still the same components just different physical appearances.
User Aranda
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