posted by Sara .
We did a experiment in class to recognize chemical change.
I don't really get this question: Identify the combinations of chemicals in which chemical changes occurred.
If the chemical changes occured in all of the combinations, then what would be a good answer?
I get the second part which is: What evidence showed that chemical changes had occured. ~ New colour arose.
Since I don't know what chemicals were combined, I can't give an adequate answer.
A color change can be one indicator. Did anything else happen?
I hope this helps.