Explanation:
A physical change is the change that does not bring any difference in the chemical properties of a substance.
For example, change in shape, size, state, mass, density etc are all physical changes.
On the other hand, a chemical change is define as the one which brings difference in chemical composition of a substance.
For example, yeast granules were added to hydrogen peroxide then fizzing and bubbling took place. This means that a chemical reaction has taken place due to which a gas is liberating out of the solution.
Also, heat is liberating due to which temperature has began to rise.
Thus, we can conclude that based on the given observation a chemical change has taken place.