Me

you will earn 50 points if you answer it correct.

1. which of the combinations in the lab activity had indications that a chemical change occurred? defend your argument with evidence.

2. which of the combinations in the lab activity had indications that a physical change occurred? defend your argument with evidence.

3. are all physical changes reversible? explain your answer using an example you've observed in your everyday life.

4. give an example of something you've observed in your everyday life that is a chemical reaction. how did you know it was a chemical reaction?