* No new substances are formed: When you stretch a rubber band, you're only changing its shape and size. The rubber molecules themselves are not changing their composition.

* The change is reversible: If you release the tension, the rubber band will return to its original shape. This means the change is temporary and doesn't alter the fundamental nature of the rubber.

Contrast this with a chemical change:

* A chemical change involves the formation of new substances with different properties. For example, burning a piece of paper is a chemical change because it creates ash, carbon dioxide, and other substances.

Let me know if you have any other questions!