ANSWER IS:( A PHYSICAL CHANGE INVOLVING CHANGE OF SHAPE AMD SIZE OF MATTER)Mrs. Clark decides to do a demonstration for her class with a piece of notebook paper. Using a balance, Mrs. Clark discovers that the mass of the paper is 20 g. She then takes the piece of paper and cuts it into several small pieces. The cumulative mass of the small pieces is 20 g. What has Mrs. Clark demonstrated for her class? A.
a physical change involving change of mass
B.
a physical change involving change of shape and size of matter
C.
a chemical change involving change of shape and size of matter
D.
a chemical change involving change of mass