Question

Riley rubs two rocks together. She notices that some of the surface of one of the rocks was worn away to form small particles. What has happened to that rock?

Answer 1

The rock has undergone physical weathering, specifically abrasion.

Step-by-step explanation:

The rock has undergone physical weathering, specifically abrasion, which is the process of rocks being worn away by the rubbing or grinding action of other rocks or particles. When Riley rubbed the two rocks together, the surface of one of the rocks was worn away to form small particles.

Answer 2

When they were rubbing the rocks together the rocks created friction