Question

how can you tell if a physical change has occurred? the change creates a new object. the composition of the substance has not changed. the change cannot be reversed.

Explanation:

A physical change is a change in which the substance's chemical composition remains the same. It only affects physical properties like shape, state, or size. Creating a new object usually implies a chemical - change, and physical changes can often be reversed.

Answer:

The composition of the substance has not changed.