Final answer:
The transformation of rocks in the rock cycle exemplifies the conservation of matter, as the total quantity of matter remains constant during such changes.
Step-by-step explanation:
When rocks change form in the rock cycle, we see an example of the conservation of matter. This fundamental principle indicates that there is no detectable change in the total quantity of matter present when matter undergoes transformation, whether through a chemical change or a change in state from solid, liquid, or gas.
For instance, during the brewing of beer, the ingredients are transformed into different substances, but the total mass remains the same, which is a reflection of the conservation of matter.