Final answer:
Weathering and transportation of rocks downstream exemplify the conservation of matter.
Step-by-step explanation:
When rock is weathered and transported downstream, this is best seen as an example of the conservation of matter.
Weathering refers to the breakdown of rocks into smaller particles through physical, chemical, and biological processes. As rocks are weathered, they do not disappear or get destroyed, but rather transform into different forms. These smaller rock particles can then be transported downstream by agents like water, wind, or ice.
This process demonstrates the conservation of matter, which is a principle in biology that states matter cannot be created or destroyed; it can only change form. Although the rocks undergo weathering and transportation, their overall mass and composition remain the same, emphasizing the conservation of matter.
Learn more about Conservation of matter in rock weathering and transportation