A scientist bends wires made of different metals to check their flexibility. Which of the following best justifies the type of change taking place?

Question

Physical change because shape is a physical property.
Chemical change because shape is a physical property.
Physical change because flexibility is a chemical property.
Chemical change because flexibility is a chemical property.

Answer 1

A.
You know a physical change has taken place when the composition of the wire, upon bending, did not change. That is, a copper wire bent is still copper. Heating a copper wire, cooling a copper wire, bending a copper wire, stretching a copper wire etc etc. All of these are physical changes for the copper wire started out as copper and it is still copper.
You know a chemical change takes place when the composition of the material changes.