* No new substances are formed: The drink mix and water simply mix together to form a solution. The chemical composition of the drink mix and water remain the same.

* The change is reversible: You can easily separate the water from the drink mix by evaporation or other methods.

* No energy is released or absorbed: The process of dissolving a drink mix in water typically involves a small amount of heat exchange, but not a significant energy change that would indicate a chemical reaction.

In contrast, a chemical change involves the formation of new substances with different properties. Examples include:

* Burning wood (producing ash, carbon dioxide, and water)

* Baking a cake (changing the ingredients into a new, solid form)

* Rusting iron (iron reacting with oxygen to form iron oxide)