Physical or Chemical change

 Hypothesis: Caught on fire.

Equipment: Sample of Zinc Oxide, Heat source,Scales, Heat proof container- Exasparating dish, Tongs, Heat proof mat.

Method: 1- Get sample of ZnO in an evaporating dish.

              2- Weight the ZnO & Container- record weight.

              3- Heat container & ZnO on Hot plate.

              4- Observe any changes- use phone for before and After photo.

              5- Take of heat and put on proof mat.

              6- Let it cool- observe- photos.

              7- Re weigh.

Results:When we put it on and mix up the ZnO in dish then it started to change Yellow then it turn back to normal. 

Conclusion:In the middle of the dish it turn yellow then went back to normal which is a Physical Change.