Final answer:
Pouring pebbles into water creates concentric ripples and displaces water, possibly causing splashing. Microscopic examination may reveal small particles or air bubbles released from the pebbles.
Step-by-step explanation:
When you pour pebbles into water, you might notice several things. First, concentric ripples are produced as the pebbles disrupt the surface tension of the water, creating waves that move outward from the point of impact. You might also observe a displacement of water, which can cause the water level to rise. If the pebbles are poured in from a height, they might cause splashing as they hit the water. Lastly, if you were to look very closely or use a microscope, you might notice minute particles or air bubbles being released into the water from the surface of the pebbles. These are results of the complex interplay of forces including gravity, surface tension, and the physical properties of water and the pebbles.