Answers

2016-03-15T08:16:54+08:00
The answer is cake baking in an oven, because a,b, and c are only physical changes, only d involves chemical reaction especially when the components or ingredients are exposed to heat it undergoes chemical reaction and is not reversible, an evidence of it chemical change is the change color of all of its components and the production of gas manifested by the pores present in  cake that makes cake soft
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2016-03-15T11:09:26+08:00
D. a cake baking in an oven
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